Finding the Fourth Proportional to 78,068.31, 107,734.28 and 42,258.21

Step by Step Solution

1. Step 1: Write the proportion equation
   78,068.31 : 107,734.28 = 42,258.21 : x
2. Step 2: Convert to fraction form
   78,068.31/107,734.28 = 42,258.21/x
3. Step 3: Cross multiply
   78,068.31x = 107,734.28 × 42,258.21
4. Step 4: Simplify right side
   78,068.31x = 4,552,657,828.44
5. Step 5: Solve for x
   x = 4,552,657,828.44/78,068.31
6. Step 6: Final answer
   x = 58,316.34