Finding the Third Proportional to 54,474 and 128,797.50

Step by Step Solution

1. Step 1: Write the proportion equation
   54,474 : 128,797.50 = 128,797.50 : x
2. Step 2: Convert to fraction form
   54,474/128,797.50 = 128,797.50/x
3. Step 3: Cross multiply
   54,474x = 128,797.50 × 128,797.50
4. Step 4: Simplify right side
   54,474x = 16,588,796,006.25
5. Step 5: Solve for x
   x = 16,588,796,006.25/54,474
6. Step 6: Final answer
   x = 304,526.86