Finding the Fourth Proportional to 154,142.98, 231,218.58 and 54,280.48

Step by Step Solution

1. Step 1: Write the proportion equation
   154,142.98 : 231,218.58 = 54,280.48 : x
2. Step 2: Convert to fraction form
   154,142.98/231,218.58 = 54,280.48/x
3. Step 3: Cross multiply
   154,142.98x = 231,218.58 × 54,280.48
4. Step 4: Simplify right side
   154,142.98x = 12,550,655,507.32
5. Step 5: Solve for x
   x = 12,550,655,507.32/154,142.98
6. Step 6: Final answer
   x = 81,422.17