Finding the Third Proportional to 152,978.50 and 331,376

Step by Step Solution

1. Step 1: Write the proportion equation
   152,978.50 : 331,376 = 331,376 : x
2. Step 2: Convert to fraction form
   152,978.50/331,376 = 331,376/x
3. Step 3: Cross multiply
   152,978.50x = 331,376 × 331,376
4. Step 4: Simplify right side
   152,978.50x = 109,810,053,376
5. Step 5: Solve for x
   x = 109,810,053,376/152,978.50
6. Step 6: Final answer
   x = 717,813.64