Finding the Fourth Proportional to 99,928.18, 137,901.25 and 54,606.17

Step by Step Solution

1. Step 1: Write the proportion equation
   99,928.18 : 137,901.25 = 54,606.17 : x
2. Step 2: Convert to fraction form
   99,928.18/137,901.25 = 54,606.17/x
3. Step 3: Cross multiply
   99,928.18x = 137,901.25 × 54,606.17
4. Step 4: Simplify right side
   99,928.18x = 7,530,258,274.69
5. Step 5: Solve for x
   x = 7,530,258,274.69/99,928.18
6. Step 6: Final answer
   x = 75,356.71