Finding the Fourth Proportional to 72,622.56, 100,201.50 and 42,390.72

Step by Step Solution

1. Step 1: Write the proportion equation
   72,622.56 : 100,201.50 = 42,390.72 : x
2. Step 2: Convert to fraction form
   72,622.56/100,201.50 = 42,390.72/x
3. Step 3: Cross multiply
   72,622.56x = 100,201.50 × 42,390.72
4. Step 4: Simplify right side
   72,622.56x = 4,247,613,730.08
5. Step 5: Solve for x
   x = 4,247,613,730.08/72,622.56
6. Step 6: Final answer
   x = 58,488.90