Finding the Third Proportional to 870,860,301,521 and 1,210,861,640,172

Step by Step Solution

1. Step 1: Write the proportion equation
   870,860,301,521 : 1,210,861,640,172 = 1,210,861,640,172 : x
2. Step 2: Convert to fraction form
   870,860,301,521/1,210,861,640,172 = 1,210,861,640,172/x
3. Step 3: Cross multiply
   870,860,301,521x = 1,210,861,640,172 × 1,210,861,640,172
4. Step 4: Simplify right side
   870,860,301,521x = 1,466,185,911,640,025,995,411,456
5. Step 5: Solve for x
   x = 1,466,185,911,640,025,995,411,456/870,860,301,521
6. Step 6: Final answer
   x = 1,683,606,324,779.37