Finding the Fourth Proportional to 81,444.10, 122,162.10 and 42,005.20

Step by Step Solution

1. Step 1: Write the proportion equation
   81,444.10 : 122,162.10 = 42,005.20 : x
2. Step 2: Convert to fraction form
   81,444.10/122,162.10 = 42,005.20/x
3. Step 3: Cross multiply
   81,444.10x = 122,162.10 × 42,005.20
4. Step 4: Simplify right side
   81,444.10x = 5,131,443,442.92
5. Step 5: Solve for x
   x = 5,131,443,442.92/81,444.10
6. Step 6: Final answer
   x = 63,005.71