Finding the Fourth Proportional to 72,440.86, 99,964.23 and 42,231.10

Step by Step Solution

1. Step 1: Write the proportion equation
   72,440.86 : 99,964.23 = 42,231.10 : x
2. Step 2: Convert to fraction form
   72,440.86/99,964.23 = 42,231.10/x
3. Step 3: Cross multiply
   72,440.86x = 99,964.23 × 42,231.10
4. Step 4: Simplify right side
   72,440.86x = 4,221,599,393.55
5. Step 5: Solve for x
   x = 4,221,599,393.55/72,440.86
6. Step 6: Final answer
   x = 58,276.49