Finding the Third Proportional to 10,221,681 and 21,861,631.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,221,681 : 21,861,631.50 = 21,861,631.50 : x
2. Step 2: Convert to fraction form
   10,221,681/21,861,631.50 = 21,861,631.50/x
3. Step 3: Cross multiply
   10,221,681x = 21,861,631.50 × 21,861,631.50
4. Step 4: Simplify right side
   10,221,681x = 477,930,931,841,792.25
5. Step 5: Solve for x
   x = 477,930,931,841,792.25/10,221,681
6. Step 6: Final answer
   x = 46,756,588.46