Finding the Fourth Proportional to 81,680.68, 112,710.42 and 45,874.60

Step by Step Solution

1. Step 1: Write the proportion equation
   81,680.68 : 112,710.42 = 45,874.60 : x
2. Step 2: Convert to fraction form
   81,680.68/112,710.42 = 45,874.60/x
3. Step 3: Cross multiply
   81,680.68x = 112,710.42 × 45,874.60
4. Step 4: Simplify right side
   81,680.68x = 5,170,545,433.33
5. Step 5: Solve for x
   x = 5,170,545,433.33/81,680.68
6. Step 6: Final answer
   x = 63,301.94