Finding the Fourth Proportional to 2,311.78, 3,188.17 and 1,526.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,311.78 : 3,188.17 = 1,526.62 : x
2. Step 2: Convert to fraction form
   2,311.78/3,188.17 = 1,526.62/x
3. Step 3: Cross multiply
   2,311.78x = 3,188.17 × 1,526.62
4. Step 4: Simplify right side
   2,311.78x = 4,867,124.09
5. Step 5: Solve for x
   x = 4,867,124.09/2,311.78
6. Step 6: Final answer
   x = 2,105.36