Finding the Third Proportional to 99,499,144.50 and 215,296,056

Step by Step Solution

1. Step 1: Write the proportion equation
   99,499,144.50 : 215,296,056 = 215,296,056 : x
2. Step 2: Convert to fraction form
   99,499,144.50/215,296,056 = 215,296,056/x
3. Step 3: Cross multiply
   99,499,144.50x = 215,296,056 × 215,296,056
4. Step 4: Simplify right side
   99,499,144.50x = 46,352,391,729,155,136
5. Step 5: Solve for x
   x = 46,352,391,729,155,136/99,499,144.50
6. Step 6: Final answer
   x = 465,857,188.64