Finding the Fourth Proportional to 28,175.95, 42,268.05 and 8,456.07

Step by Step Solution

1. Step 1: Write the proportion equation
   28,175.95 : 42,268.05 = 8,456.07 : x
2. Step 2: Convert to fraction form
   28,175.95/42,268.05 = 8,456.07/x
3. Step 3: Cross multiply
   28,175.95x = 42,268.05 × 8,456.07
4. Step 4: Simplify right side
   28,175.95x = 357,421,483.89
5. Step 5: Solve for x
   x = 357,421,483.89/28,175.95
6. Step 6: Final answer
   x = 12,685.34