Finding the Fourth Proportional to 78,638.24, 108,522.84 and 42,829.76

Step by Step Solution

1. Step 1: Write the proportion equation
   78,638.24 : 108,522.84 = 42,829.76 : x
2. Step 2: Convert to fraction form
   78,638.24/108,522.84 = 42,829.76/x
3. Step 3: Cross multiply
   78,638.24x = 108,522.84 × 42,829.76
4. Step 4: Simplify right side
   78,638.24x = 4,648,007,191.72
5. Step 5: Solve for x
   x = 4,648,007,191.72/78,638.24
6. Step 6: Final answer
   x = 59,106.20