Finding the Fourth Proportional to 81,451.89, 112,403.46 and 49,620.79

Step by Step Solution

1. Step 1: Write the proportion equation
   81,451.89 : 112,403.46 = 49,620.79 : x
2. Step 2: Convert to fraction form
   81,451.89/112,403.46 = 49,620.79/x
3. Step 3: Cross multiply
   81,451.89x = 112,403.46 × 49,620.79
4. Step 4: Simplify right side
   81,451.89x = 5,577,548,483.93
5. Step 5: Solve for x
   x = 5,577,548,483.93/81,451.89
6. Step 6: Final answer
   x = 68,476.60