Finding the Third Proportional to 78,631,132.50 and 123,080,271

Step by Step Solution

1. Step 1: Write the proportion equation
   78,631,132.50 : 123,080,271 = 123,080,271 : x
2. Step 2: Convert to fraction form
   78,631,132.50/123,080,271 = 123,080,271/x
3. Step 3: Cross multiply
   78,631,132.50x = 123,080,271 × 123,080,271
4. Step 4: Simplify right side
   78,631,132.50x = 15,148,753,109,433,440
5. Step 5: Solve for x
   x = 15,148,753,109,433,440/78,631,132.50
6. Step 6: Final answer
   x = 192,655,919.20