Finding the Third Proportional to 149,665.50 and 318,736.13

Step by Step Solution

1. Step 1: Write the proportion equation
   149,665.50 : 318,736.13 = 318,736.13 : x
2. Step 2: Convert to fraction form
   149,665.50/318,736.13 = 318,736.13/x
3. Step 3: Cross multiply
   149,665.50x = 318,736.13 × 318,736.13
4. Step 4: Simplify right side
   149,665.50x = 101,592,717,380.02
5. Step 5: Solve for x
   x = 101,592,717,380.02/149,665.50
6. Step 6: Final answer
   x = 678,798.50