Finding the Fourth Proportional to 78,069.41, 107,735.85 and 42,259.31

Step by Step Solution

1. Step 1: Write the proportion equation
   78,069.41 : 107,735.85 = 42,259.31 : x
2. Step 2: Convert to fraction form
   78,069.41/107,735.85 = 42,259.31/x
3. Step 3: Cross multiply
   78,069.41x = 107,735.85 × 42,259.31
4. Step 4: Simplify right side
   78,069.41x = 4,552,842,683.26
5. Step 5: Solve for x
   x = 4,552,842,683.26/78,069.41
6. Step 6: Final answer
   x = 58,317.88