Finding the Fourth Proportional to 28,175.89, 42,270.86 and 8,454.81

Step by Step Solution

1. Step 1: Write the proportion equation
   28,175.89 : 42,270.86 = 8,454.81 : x
2. Step 2: Convert to fraction form
   28,175.89/42,270.86 = 8,454.81/x
3. Step 3: Cross multiply
   28,175.89x = 42,270.86 × 8,454.81
4. Step 4: Simplify right side
   28,175.89x = 357,392,089.84
5. Step 5: Solve for x
   x = 357,392,089.84/28,175.89
6. Step 6: Final answer
   x = 12,684.32