Finding the Fourth Proportional to 78,684.28, 108,579.82 and 42,872.56

Step by Step Solution

1. Step 1: Write the proportion equation
   78,684.28 : 108,579.82 = 42,872.56 : x
2. Step 2: Convert to fraction form
   78,684.28/108,579.82 = 42,872.56/x
3. Step 3: Cross multiply
   78,684.28x = 108,579.82 × 42,872.56
4. Step 4: Simplify right side
   78,684.28x = 4,655,094,847.74
5. Step 5: Solve for x
   x = 4,655,094,847.74/78,684.28
6. Step 6: Final answer
   x = 59,161.69