Finding the Fourth Proportional to 99,676.19, 137,550.65 and 54,355.05

Step by Step Solution

1. Step 1: Write the proportion equation
   99,676.19 : 137,550.65 = 54,355.05 : x
2. Step 2: Convert to fraction form
   99,676.19/137,550.65 = 54,355.05/x
3. Step 3: Cross multiply
   99,676.19x = 137,550.65 × 54,355.05
4. Step 4: Simplify right side
   99,676.19x = 7,476,571,978.52
5. Step 5: Solve for x
   x = 7,476,571,978.52/99,676.19
6. Step 6: Final answer
   x = 75,008.60