Finding the Fourth Proportional to 72,322.20, 99,801.72 and 42,108.42

Step by Step Solution

1. Step 1: Write the proportion equation
   72,322.20 : 99,801.72 = 42,108.42 : x
2. Step 2: Convert to fraction form
   72,322.20/99,801.72 = 42,108.42/x
3. Step 3: Cross multiply
   72,322.20x = 99,801.72 × 42,108.42
4. Step 4: Simplify right side
   72,322.20x = 4,202,492,742.48
5. Step 5: Solve for x
   x = 4,202,492,742.48/72,322.20
6. Step 6: Final answer
   x = 58,107.92