Finding the Fourth Proportional to 78,394.88, 108,143.50 and 49,663.88

Step by Step Solution

1. Step 1: Write the proportion equation
   78,394.88 : 108,143.50 = 49,663.88 : x
2. Step 2: Convert to fraction form
   78,394.88/108,143.50 = 49,663.88/x
3. Step 3: Cross multiply
   78,394.88x = 108,143.50 × 49,663.88
4. Step 4: Simplify right side
   78,394.88x = 5,370,825,806.78
5. Step 5: Solve for x
   x = 5,370,825,806.78/78,394.88
6. Step 6: Final answer
   x = 68,509.91