Finding the Fourth Proportional to 78,736.71, 108,657 and 50,458.80

Step by Step Solution

1. Step 1: Write the proportion equation
   78,736.71 : 108,657 = 50,458.80 : x
2. Step 2: Convert to fraction form
   78,736.71/108,657 = 50,458.80/x
3. Step 3: Cross multiply
   78,736.71x = 108,657 × 50,458.80
4. Step 4: Simplify right side
   78,736.71x = 5,482,701,831.60
5. Step 5: Solve for x
   x = 5,482,701,831.60/78,736.71
6. Step 6: Final answer
   x = 69,633.36