Finding the Fourth Proportional to 99,336.71, 137,085.34 and 54,015.19

Step by Step Solution

1. Step 1: Write the proportion equation
   99,336.71 : 137,085.34 = 54,015.19 : x
2. Step 2: Convert to fraction form
   99,336.71/137,085.34 = 54,015.19/x
3. Step 3: Cross multiply
   99,336.71x = 137,085.34 × 54,015.19
4. Step 4: Simplify right side
   99,336.71x = 7,404,690,000.89
5. Step 5: Solve for x
   x = 7,404,690,000.89/99,336.71
6. Step 6: Final answer
   x = 74,541.33