Finding the Fourth Proportional to 78,040.52, 107,696.20 and 42,230.53

Step by Step Solution

1. Step 1: Write the proportion equation
   78,040.52 : 107,696.20 = 42,230.53 : x
2. Step 2: Convert to fraction form
   78,040.52/107,696.20 = 42,230.53/x
3. Step 3: Cross multiply
   78,040.52x = 107,696.20 × 42,230.53
4. Step 4: Simplify right side
   78,040.52x = 4,548,067,107.42
5. Step 5: Solve for x
   x = 4,548,067,107.42/78,040.52
6. Step 6: Final answer
   x = 58,278.28