Finding the Third Proportional to 10,430,946 and 21,156,673.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,430,946 : 21,156,673.50 = 21,156,673.50 : x
2. Step 2: Convert to fraction form
   10,430,946/21,156,673.50 = 21,156,673.50/x
3. Step 3: Cross multiply
   10,430,946x = 21,156,673.50 × 21,156,673.50
4. Step 4: Simplify right side
   10,430,946x = 447,604,833,585,602.25
5. Step 5: Solve for x
   x = 447,604,833,585,602.25/10,430,946
6. Step 6: Final answer
   x = 42,911,240.61