Finding the Fourth Proportional to 99,839.85, 137,779.55 and 54,519

Step by Step Solution

1. Step 1: Write the proportion equation
   99,839.85 : 137,779.55 = 54,519 : x
2. Step 2: Convert to fraction form
   99,839.85/137,779.55 = 54,519/x
3. Step 3: Cross multiply
   99,839.85x = 137,779.55 × 54,519
4. Step 4: Simplify right side
   99,839.85x = 7,511,603,286.45
5. Step 5: Solve for x
   x = 7,511,603,286.45/99,839.85
6. Step 6: Final answer
   x = 75,236.52