Finding the Fourth Proportional to 28,086.37, 42,131.40 and 8,363.29

Step by Step Solution

1. Step 1: Write the proportion equation
   28,086.37 : 42,131.40 = 8,363.29 : x
2. Step 2: Convert to fraction form
   28,086.37/42,131.40 = 8,363.29/x
3. Step 3: Cross multiply
   28,086.37x = 42,131.40 × 8,363.29
4. Step 4: Simplify right side
   28,086.37x = 352,357,116.31
5. Step 5: Solve for x
   x = 352,357,116.31/28,086.37
6. Step 6: Final answer
   x = 12,545.48