Finding the Fourth Proportional to 81,098.78, 111,916.58 and 45,290.12

Step by Step Solution

1. Step 1: Write the proportion equation
   81,098.78 : 111,916.58 = 45,290.12 : x
2. Step 2: Convert to fraction form
   81,098.78/111,916.58 = 45,290.12/x
3. Step 3: Cross multiply
   81,098.78x = 111,916.58 × 45,290.12
4. Step 4: Simplify right side
   81,098.78x = 5,068,714,552.16
5. Step 5: Solve for x
   x = 5,068,714,552.16/81,098.78
6. Step 6: Final answer
   x = 62,500.51