Finding the Fourth Proportional to 78,471.72, 108,292.07 and 42,661.76

Step by Step Solution

1. Step 1: Write the proportion equation
   78,471.72 : 108,292.07 = 42,661.76 : x
2. Step 2: Convert to fraction form
   78,471.72/108,292.07 = 42,661.76/x
3. Step 3: Cross multiply
   78,471.72x = 108,292.07 × 42,661.76
4. Step 4: Simplify right side
   78,471.72x = 4,619,929,865.44
5. Step 5: Solve for x
   x = 4,619,929,865.44/78,471.72
6. Step 6: Final answer
   x = 58,873.82