Finding the Fourth Proportional to 78,221.85, 107,906.42 and 49,493.10

Step by Step Solution

1. Step 1: Write the proportion equation
   78,221.85 : 107,906.42 = 49,493.10 : x
2. Step 2: Convert to fraction form
   78,221.85/107,906.42 = 49,493.10/x
3. Step 3: Cross multiply
   78,221.85x = 107,906.42 × 49,493.10
4. Step 4: Simplify right side
   78,221.85x = 5,340,622,583.59
5. Step 5: Solve for x
   x = 5,340,622,583.59/78,221.85
6. Step 6: Final answer
   x = 68,275.33