Finding the Fourth Proportional to 172,700.72, 259,050.72 and 54,382.40

Step by Step Solution

1. Step 1: Write the proportion equation
   172,700.72 : 259,050.72 = 54,382.40 : x
2. Step 2: Convert to fraction form
   172,700.72/259,050.72 = 54,382.40/x
3. Step 3: Cross multiply
   172,700.72x = 259,050.72 × 54,382.40
4. Step 4: Simplify right side
   172,700.72x = 14,087,799,875.33
5. Step 5: Solve for x
   x = 14,087,799,875.33/172,700.72
6. Step 6: Final answer
   x = 81,573.49