Finding the Fourth Proportional to 28,265.10, 42,404.31 and 8,543.82

Step by Step Solution

1. Step 1: Write the proportion equation
   28,265.10 : 42,404.31 = 8,543.82 : x
2. Step 2: Convert to fraction form
   28,265.10/42,404.31 = 8,543.82/x
3. Step 3: Cross multiply
   28,265.10x = 42,404.31 × 8,543.82
4. Step 4: Simplify right side
   28,265.10x = 362,294,791.86
5. Step 5: Solve for x
   x = 362,294,791.86/28,265.10
6. Step 6: Final answer
   x = 12,817.74