Finding the Fourth Proportional to 78,682.55, 108,578.04 and 42,870.41

Step by Step Solution

1. Step 1: Write the proportion equation
   78,682.55 : 108,578.04 = 42,870.41 : x
2. Step 2: Convert to fraction form
   78,682.55/108,578.04 = 42,870.41/x
3. Step 3: Cross multiply
   78,682.55x = 108,578.04 × 42,870.41
4. Step 4: Simplify right side
   78,682.55x = 4,654,785,091.80
5. Step 5: Solve for x
   x = 4,654,785,091.80/78,682.55
6. Step 6: Final answer
   x = 59,159.05