Finding the Fourth Proportional to 72,139.80, 99,535.83 and 41,907.15

Step by Step Solution

1. Step 1: Write the proportion equation
   72,139.80 : 99,535.83 = 41,907.15 : x
2. Step 2: Convert to fraction form
   72,139.80/99,535.83 = 41,907.15/x
3. Step 3: Cross multiply
   72,139.80x = 99,535.83 × 41,907.15
4. Step 4: Simplify right side
   72,139.80x = 4,171,262,958.18
5. Step 5: Solve for x
   x = 4,171,262,958.18/72,139.80
6. Step 6: Final answer
   x = 57,821.94