Finding the Fourth Proportional to 78,258.89, 107,997.44 and 42,449.06

Step by Step Solution

1. Step 1: Write the proportion equation
   78,258.89 : 107,997.44 = 42,449.06 : x
2. Step 2: Convert to fraction form
   78,258.89/107,997.44 = 42,449.06/x
3. Step 3: Cross multiply
   78,258.89x = 107,997.44 × 42,449.06
4. Step 4: Simplify right side
   78,258.89x = 4,584,389,868.15
5. Step 5: Solve for x
   x = 4,584,389,868.15/78,258.89
6. Step 6: Final answer
   x = 58,579.79