Finding the Fourth Proportional to 78,426.74, 108,229.58 and 42,616.75

Step by Step Solution

1. Step 1: Write the proportion equation
   78,426.74 : 108,229.58 = 42,616.75 : x
2. Step 2: Convert to fraction form
   78,426.74/108,229.58 = 42,616.75/x
3. Step 3: Cross multiply
   78,426.74x = 108,229.58 × 42,616.75
4. Step 4: Simplify right side
   78,426.74x = 4,612,392,953.47
5. Step 5: Solve for x
   x = 4,612,392,953.47/78,426.74
6. Step 6: Final answer
   x = 58,811.48