Finding the Fourth Proportional to 78,118.24, 107,803.20 and 42,308.56

Step by Step Solution

1. Step 1: Write the proportion equation
   78,118.24 : 107,803.20 = 42,308.56 : x
2. Step 2: Convert to fraction form
   78,118.24/107,803.20 = 42,308.56/x
3. Step 3: Cross multiply
   78,118.24x = 107,803.20 × 42,308.56
4. Step 4: Simplify right side
   78,118.24x = 4,560,998,155.39
5. Step 5: Solve for x
   x = 4,560,998,155.39/78,118.24
6. Step 6: Final answer
   x = 58,385.83