Finding the Fourth Proportional to 28,111.91, 42,167.84 and 9,388.44

Step by Step Solution

1. Step 1: Write the proportion equation
   28,111.91 : 42,167.84 = 9,388.44 : x
2. Step 2: Convert to fraction form
   28,111.91/42,167.84 = 9,388.44/x
3. Step 3: Cross multiply
   28,111.91x = 42,167.84 × 9,388.44
4. Step 4: Simplify right side
   28,111.91x = 395,890,188.83
5. Step 5: Solve for x
   x = 395,890,188.83/28,111.91
6. Step 6: Final answer
   x = 14,082.65