Finding the Fourth Proportional to 78,068.47, 107,734.54 and 42,258.78

Step by Step Solution

1. Step 1: Write the proportion equation
   78,068.47 : 107,734.54 = 42,258.78 : x
2. Step 2: Convert to fraction form
   78,068.47/107,734.54 = 42,258.78/x
3. Step 3: Cross multiply
   78,068.47x = 107,734.54 × 42,258.78
4. Step 4: Simplify right side
   78,068.47x = 4,552,729,685.59
5. Step 5: Solve for x
   x = 4,552,729,685.59/78,068.47
6. Step 6: Final answer
   x = 58,317.14