Finding the Fourth Proportional to 99,863.39, 137,810.78 and 54,541.39

Step by Step Solution

1. Step 1: Write the proportion equation
   99,863.39 : 137,810.78 = 54,541.39 : x
2. Step 2: Convert to fraction form
   99,863.39/137,810.78 = 54,541.39/x
3. Step 3: Cross multiply
   99,863.39x = 137,810.78 × 54,541.39
4. Step 4: Simplify right side
   99,863.39x = 7,516,391,498.18
5. Step 5: Solve for x
   x = 7,516,391,498.18/99,863.39
6. Step 6: Final answer
   x = 75,266.74