Finding the Fourth Proportional to 72,574.20, 100,155.15 and 42,354.72

Step by Step Solution

1. Step 1: Write the proportion equation
   72,574.20 : 100,155.15 = 42,354.72 : x
2. Step 2: Convert to fraction form
   72,574.20/100,155.15 = 42,354.72/x
3. Step 3: Cross multiply
   72,574.20x = 100,155.15 × 42,354.72
4. Step 4: Simplify right side
   72,574.20x = 4,242,043,334.81
5. Step 5: Solve for x
   x = 4,242,043,334.81/72,574.20
6. Step 6: Final answer
   x = 58,451.12