Finding the Fourth Proportional to 99,411.15, 137,183.28 and 54,089.31

Step by Step Solution

1. Step 1: Write the proportion equation
   99,411.15 : 137,183.28 = 54,089.31 : x
2. Step 2: Convert to fraction form
   99,411.15/137,183.28 = 54,089.31/x
3. Step 3: Cross multiply
   99,411.15x = 137,183.28 × 54,089.31
4. Step 4: Simplify right side
   99,411.15x = 7,420,148,857.32
5. Step 5: Solve for x
   x = 7,420,148,857.32/99,411.15
6. Step 6: Final answer
   x = 74,641.01