Finding the Fourth Proportional to 28,315.88, 42,460.86 and 8,587.52

Step by Step Solution

1. Step 1: Write the proportion equation
   28,315.88 : 42,460.86 = 8,587.52 : x
2. Step 2: Convert to fraction form
   28,315.88/42,460.86 = 8,587.52/x
3. Step 3: Cross multiply
   28,315.88x = 42,460.86 × 8,587.52
4. Step 4: Simplify right side
   28,315.88x = 364,633,484.47
5. Step 5: Solve for x
   x = 364,633,484.47/28,315.88
6. Step 6: Final answer
   x = 12,877.35