Finding the Fourth Proportional to 172,434.76, 258,695.89 and 54,107.12

Step by Step Solution

1. Step 1: Write the proportion equation
   172,434.76 : 258,695.89 = 54,107.12 : x
2. Step 2: Convert to fraction form
   172,434.76/258,695.89 = 54,107.12/x
3. Step 3: Cross multiply
   172,434.76x = 258,695.89 × 54,107.12
4. Step 4: Simplify right side
   172,434.76x = 13,997,290,075.21
5. Step 5: Solve for x
   x = 13,997,290,075.21/172,434.76
6. Step 6: Final answer
   x = 81,174.41