Finding the Fourth Proportional to 78,120.34, 107,805.81 and 42,310.26

Step by Step Solution

1. Step 1: Write the proportion equation
   78,120.34 : 107,805.81 = 42,310.26 : x
2. Step 2: Convert to fraction form
   78,120.34/107,805.81 = 42,310.26/x
3. Step 3: Cross multiply
   78,120.34x = 107,805.81 × 42,310.26
4. Step 4: Simplify right side
   78,120.34x = 4,561,291,850.61
5. Step 5: Solve for x
   x = 4,561,291,850.61/78,120.34
6. Step 6: Final answer
   x = 58,388.02