Finding the Fourth Proportional to 81,234.72, 112,103.28 and 45,424.80

Step by Step Solution

1. Step 1: Write the proportion equation
   81,234.72 : 112,103.28 = 45,424.80 : x
2. Step 2: Convert to fraction form
   81,234.72/112,103.28 = 45,424.80/x
3. Step 3: Cross multiply
   81,234.72x = 112,103.28 × 45,424.80
4. Step 4: Simplify right side
   81,234.72x = 5,092,269,073.34
5. Step 5: Solve for x
   x = 5,092,269,073.34/81,234.72
6. Step 6: Final answer
   x = 62,685.87