Finding the Third Proportional to 866,564 and 1,870,139

Step by Step Solution

1. Step 1: Write the proportion equation
   866,564 : 1,870,139 = 1,870,139 : x
2. Step 2: Convert to fraction form
   866,564/1,870,139 = 1,870,139/x
3. Step 3: Cross multiply
   866,564x = 1,870,139 × 1,870,139
4. Step 4: Simplify right side
   866,564x = 3,497,419,879,321
5. Step 5: Solve for x
   x = 3,497,419,879,321/866,564
6. Step 6: Final answer
   x = 4,035,962.58