Finding the Fourth Proportional to 72,061.42, 99,442.11 and 40,231.66

Step by Step Solution

1. Step 1: Write the proportion equation
   72,061.42 : 99,442.11 = 40,231.66 : x
2. Step 2: Convert to fraction form
   72,061.42/99,442.11 = 40,231.66/x
3. Step 3: Cross multiply
   72,061.42x = 99,442.11 × 40,231.66
4. Step 4: Simplify right side
   72,061.42x = 4,000,721,159.20
5. Step 5: Solve for x
   x = 4,000,721,159.20/72,061.42
6. Step 6: Final answer
   x = 55,518.21