Finding the Fourth Proportional to 28,404.15, 42,606.02 and 8,682.63

Step by Step Solution

1. Step 1: Write the proportion equation
   28,404.15 : 42,606.02 = 8,682.63 : x
2. Step 2: Convert to fraction form
   28,404.15/42,606.02 = 8,682.63/x
3. Step 3: Cross multiply
   28,404.15x = 42,606.02 × 8,682.63
4. Step 4: Simplify right side
   28,404.15x = 369,932,264.02
5. Step 5: Solve for x
   x = 369,932,264.02/28,404.15
6. Step 6: Final answer
   x = 13,023.88