Finding the Third Proportional to 177,892.50 and 388,617

Step by Step Solution

1. Step 1: Write the proportion equation
   177,892.50 : 388,617 = 388,617 : x
2. Step 2: Convert to fraction form
   177,892.50/388,617 = 388,617/x
3. Step 3: Cross multiply
   177,892.50x = 388,617 × 388,617
4. Step 4: Simplify right side
   177,892.50x = 151,023,172,689
5. Step 5: Solve for x
   x = 151,023,172,689/177,892.50
6. Step 6: Final answer
   x = 848,957.50