Finding the Fourth Proportional to 28,271.88, 42,397.88 and 8,275.86

Step by Step Solution

1. Step 1: Write the proportion equation
   28,271.88 : 42,397.88 = 8,275.86 : x
2. Step 2: Convert to fraction form
   28,271.88/42,397.88 = 8,275.86/x
3. Step 3: Cross multiply
   28,271.88x = 42,397.88 × 8,275.86
4. Step 4: Simplify right side
   28,271.88x = 350,878,877.80
5. Step 5: Solve for x
   x = 350,878,877.80/28,271.88
6. Step 6: Final answer
   x = 12,410.88