Finding the Third Proportional to 5,613,309 and 8,538,061.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,613,309 : 8,538,061.50 = 8,538,061.50 : x
2. Step 2: Convert to fraction form
   5,613,309/8,538,061.50 = 8,538,061.50/x
3. Step 3: Cross multiply
   5,613,309x = 8,538,061.50 × 8,538,061.50
4. Step 4: Simplify right side
   5,613,309x = 72,898,494,177,782.25
5. Step 5: Solve for x
   x = 72,898,494,177,782.25/5,613,309
6. Step 6: Final answer
   x = 12,986,723.91