Finding the Fourth Proportional to 81,393.84, 112,324.98 and 49,128.50

Step by Step Solution

1. Step 1: Write the proportion equation
   81,393.84 : 112,324.98 = 49,128.50 : x
2. Step 2: Convert to fraction form
   81,393.84/112,324.98 = 49,128.50/x
3. Step 3: Cross multiply
   81,393.84x = 112,324.98 × 49,128.50
4. Step 4: Simplify right side
   81,393.84x = 5,518,357,218.31
5. Step 5: Solve for x
   x = 5,518,357,218.31/81,393.84
6. Step 6: Final answer
   x = 67,798.22