Finding the Fourth Proportional to 28,182.93, 42,261.94 and 8,457.71

Step by Step Solution

1. Step 1: Write the proportion equation
   28,182.93 : 42,261.94 = 8,457.71 : x
2. Step 2: Convert to fraction form
   28,182.93/42,261.94 = 8,457.71/x
3. Step 3: Cross multiply
   28,182.93x = 42,261.94 × 8,457.71
4. Step 4: Simplify right side
   28,182.93x = 357,438,978.96
5. Step 5: Solve for x
   x = 357,438,978.96/28,182.93
6. Step 6: Final answer
   x = 12,682.82