Finding the Fourth Proportional to 78,738.47, 108,658.04 and 42,928.41

Step by Step Solution

1. Step 1: Write the proportion equation
   78,738.47 : 108,658.04 = 42,928.41 : x
2. Step 2: Convert to fraction form
   78,738.47/108,658.04 = 42,928.41/x
3. Step 3: Cross multiply
   78,738.47x = 108,658.04 × 42,928.41
4. Step 4: Simplify right side
   78,738.47x = 4,664,516,676.27
5. Step 5: Solve for x
   x = 4,664,516,676.27/78,738.47
6. Step 6: Final answer
   x = 59,240.64