Finding the Fourth Proportional to 72,359.20, 99,868.06 and 42,162.42

Step by Step Solution

1. Step 1: Write the proportion equation
   72,359.20 : 99,868.06 = 42,162.42 : x
2. Step 2: Convert to fraction form
   72,359.20/99,868.06 = 42,162.42/x
3. Step 3: Cross multiply
   72,359.20x = 99,868.06 × 42,162.42
4. Step 4: Simplify right side
   72,359.20x = 4,210,679,517.51
5. Step 5: Solve for x
   x = 4,210,679,517.51/72,359.20
6. Step 6: Final answer
   x = 58,191.35