Finding the Fourth Proportional to 78,711.42, 108,580.82 and 49,981.92

Step by Step Solution

1. Step 1: Write the proportion equation
   78,711.42 : 108,580.82 = 49,981.92 : x
2. Step 2: Convert to fraction form
   78,711.42/108,580.82 = 49,981.92/x
3. Step 3: Cross multiply
   78,711.42x = 108,580.82 × 49,981.92
4. Step 4: Simplify right side
   78,711.42x = 5,427,077,858.77
5. Step 5: Solve for x
   x = 5,427,077,858.77/78,711.42
6. Step 6: Final answer
   x = 68,949.05