Finding the Fourth Proportional to 99,798.57, 137,725.34 and 54,479.25

Step by Step Solution

1. Step 1: Write the proportion equation
   99,798.57 : 137,725.34 = 54,479.25 : x
2. Step 2: Convert to fraction form
   99,798.57/137,725.34 = 54,479.25/x
3. Step 3: Cross multiply
   99,798.57x = 137,725.34 × 54,479.25
4. Step 4: Simplify right side
   99,798.57x = 7,503,172,956.80
5. Step 5: Solve for x
   x = 7,503,172,956.80/99,798.57
6. Step 6: Final answer
   x = 75,183.17