Finding the Third Proportional to 21,703,309 and 28,931,989.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,703,309 : 28,931,989.50 = 28,931,989.50 : x
2. Step 2: Convert to fraction form
   21,703,309/28,931,989.50 = 28,931,989.50/x
3. Step 3: Cross multiply
   21,703,309x = 28,931,989.50 × 28,931,989.50
4. Step 4: Simplify right side
   21,703,309x = 837,060,016,428,110.25
5. Step 5: Solve for x
   x = 837,060,016,428,110.25/21,703,309
6. Step 6: Final answer
   x = 38,568,313.08