Finding the Fourth Proportional to 78,716.48, 108,625.59 and 42,905.74

Step by Step Solution

1. Step 1: Write the proportion equation
   78,716.48 : 108,625.59 = 42,905.74 : x
2. Step 2: Convert to fraction form
   78,716.48/108,625.59 = 42,905.74/x
3. Step 3: Cross multiply
   78,716.48x = 108,625.59 × 42,905.74
4. Step 4: Simplify right side
   78,716.48x = 4,660,661,321.89
5. Step 5: Solve for x
   x = 4,660,661,321.89/78,716.48
6. Step 6: Final answer
   x = 59,208.20