Finding the Fourth Proportional to 99,399.37, 137,171.46 and 54,077.35

Step by Step Solution

1. Step 1: Write the proportion equation
   99,399.37 : 137,171.46 = 54,077.35 : x
2. Step 2: Convert to fraction form
   99,399.37/137,171.46 = 54,077.35/x
3. Step 3: Cross multiply
   99,399.37x = 137,171.46 × 54,077.35
4. Step 4: Simplify right side
   99,399.37x = 7,417,868,366.57
5. Step 5: Solve for x
   x = 7,417,868,366.57/99,399.37
6. Step 6: Final answer
   x = 74,626.92