Finding the Fourth Proportional to 28,082.86, 42,087.83 and 11,423.50

Step by Step Solution

1. Step 1: Write the proportion equation
   28,082.86 : 42,087.83 = 11,423.50 : x
2. Step 2: Convert to fraction form
   28,082.86/42,087.83 = 11,423.50/x
3. Step 3: Cross multiply
   28,082.86x = 42,087.83 × 11,423.50
4. Step 4: Simplify right side
   28,082.86x = 480,790,326.01
5. Step 5: Solve for x
   x = 480,790,326.01/28,082.86
6. Step 6: Final answer
   x = 17,120.42