Finding the Fourth Proportional to 72,358.01, 99,855.11 and 42,142.55

Step by Step Solution

1. Step 1: Write the proportion equation
   72,358.01 : 99,855.11 = 42,142.55 : x
2. Step 2: Convert to fraction form
   72,358.01/99,855.11 = 42,142.55/x
3. Step 3: Cross multiply
   72,358.01x = 99,855.11 × 42,142.55
4. Step 4: Simplify right side
   72,358.01x = 4,208,148,572.01
5. Step 5: Solve for x
   x = 4,208,148,572.01/72,358.01
6. Step 6: Final answer
   x = 58,157.33