Finding the Fourth Proportional to 99,339.39, 137,087.61 and 54,017.40

Step by Step Solution

1. Step 1: Write the proportion equation
   99,339.39 : 137,087.61 = 54,017.40 : x
2. Step 2: Convert to fraction form
   99,339.39/137,087.61 = 54,017.40/x
3. Step 3: Cross multiply
   99,339.39x = 137,087.61 × 54,017.40
4. Step 4: Simplify right side
   99,339.39x = 7,405,116,264.41
5. Step 5: Solve for x
   x = 7,405,116,264.41/99,339.39
6. Step 6: Final answer
   x = 74,543.61