Finding the Fourth Proportional to 99,754.89, 137,665.05 and 54,435.35

Step by Step Solution

1. Step 1: Write the proportion equation
   99,754.89 : 137,665.05 = 54,435.35 : x
2. Step 2: Convert to fraction form
   99,754.89/137,665.05 = 54,435.35/x
3. Step 3: Cross multiply
   99,754.89x = 137,665.05 × 54,435.35
4. Step 4: Simplify right side
   99,754.89x = 7,493,845,179.52
5. Step 5: Solve for x
   x = 7,493,845,179.52/99,754.89
6. Step 6: Final answer
   x = 75,122.58