Finding the Fourth Proportional to 99,895.59, 137,853.59 and 54,573.75

Step by Step Solution

1. Step 1: Write the proportion equation
   99,895.59 : 137,853.59 = 54,573.75 : x
2. Step 2: Convert to fraction form
   99,895.59/137,853.59 = 54,573.75/x
3. Step 3: Cross multiply
   99,895.59x = 137,853.59 × 54,573.75
4. Step 4: Simplify right side
   99,895.59x = 7,523,187,084.39
5. Step 5: Solve for x
   x = 7,523,187,084.39/99,895.59
6. Step 6: Final answer
   x = 75,310.50