Finding the Fourth Proportional to 28,086.42, 42,115.52 and 9,359.90

Step by Step Solution

1. Step 1: Write the proportion equation
   28,086.42 : 42,115.52 = 9,359.90 : x
2. Step 2: Convert to fraction form
   28,086.42/42,115.52 = 9,359.90/x
3. Step 3: Cross multiply
   28,086.42x = 42,115.52 × 9,359.90
4. Step 4: Simplify right side
   28,086.42x = 394,196,868.47
5. Step 5: Solve for x
   x = 394,196,868.47/28,086.42
6. Step 6: Final answer
   x = 14,035.14