Finding the Fourth Proportional to 81,490.12, 112,456.22 and 45,680.12

Step by Step Solution

1. Step 1: Write the proportion equation
   81,490.12 : 112,456.22 = 45,680.12 : x
2. Step 2: Convert to fraction form
   81,490.12/112,456.22 = 45,680.12/x
3. Step 3: Cross multiply
   81,490.12x = 112,456.22 × 45,680.12
4. Step 4: Simplify right side
   81,490.12x = 5,137,013,624.35
5. Step 5: Solve for x
   x = 5,137,013,624.35/81,490.12
6. Step 6: Final answer
   x = 63,038.48