Finding the Fourth Proportional to 78,118.25, 107,803.26 and 42,308.30

Step by Step Solution

1. Step 1: Write the proportion equation
   78,118.25 : 107,803.26 = 42,308.30 : x
2. Step 2: Convert to fraction form
   78,118.25/107,803.26 = 42,308.30/x
3. Step 3: Cross multiply
   78,118.25x = 107,803.26 × 42,308.30
4. Step 4: Simplify right side
   78,118.25x = 4,560,972,934.57
5. Step 5: Solve for x
   x = 4,560,972,934.57/78,118.25
6. Step 6: Final answer
   x = 58,385.50