Finding the Fourth Proportional to 99,929.31, 137,902.82 and 54,607.31

Step by Step Solution

1. Step 1: Write the proportion equation
   99,929.31 : 137,902.82 = 54,607.31 : x
2. Step 2: Convert to fraction form
   99,929.31/137,902.82 = 54,607.31/x
3. Step 3: Cross multiply
   99,929.31x = 137,902.82 × 54,607.31
4. Step 4: Simplify right side
   99,929.31x = 7,530,502,041.61
5. Step 5: Solve for x
   x = 7,530,502,041.61/99,929.31
6. Step 6: Final answer
   x = 75,358.29