Finding the Fourth Proportional to 2,111.31, 2,913.30 and 1,325.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.31 : 2,913.30 = 1,325.61 : x
2. Step 2: Convert to fraction form
   2,111.31/2,913.30 = 1,325.61/x
3. Step 3: Cross multiply
   2,111.31x = 2,913.30 × 1,325.61
4. Step 4: Simplify right side
   2,111.31x = 3,861,899.61
5. Step 5: Solve for x
   x = 3,861,899.61/2,111.31
6. Step 6: Final answer
   x = 1,829.15