Finding the Fourth Proportional to 72,417.92, 99,907.84 and 42,198.72

Step by Step Solution

1. Step 1: Write the proportion equation
   72,417.92 : 99,907.84 = 42,198.72 : x
2. Step 2: Convert to fraction form
   72,417.92/99,907.84 = 42,198.72/x
3. Step 3: Cross multiply
   72,417.92x = 99,907.84 × 42,198.72
4. Step 4: Simplify right side
   72,417.92x = 4,215,982,965.96
5. Step 5: Solve for x
   x = 4,215,982,965.96/72,417.92
6. Step 6: Final answer
   x = 58,217.40