Finding the Fourth Proportional to 99,591.68, 137,434.72 and 54,269.96

Step by Step Solution

1. Step 1: Write the proportion equation
   99,591.68 : 137,434.72 = 54,269.96 : x
2. Step 2: Convert to fraction form
   99,591.68/137,434.72 = 54,269.96/x
3. Step 3: Cross multiply
   99,591.68x = 137,434.72 × 54,269.96
4. Step 4: Simplify right side
   99,591.68x = 7,458,576,757.01
5. Step 5: Solve for x
   x = 7,458,576,757.01/99,591.68
6. Step 6: Final answer
   x = 74,891.56