Finding the Fourth Proportional to 2,113.50, 2,915.40 and 1,326.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,113.50 : 2,915.40 = 1,326.18 : x
2. Step 2: Convert to fraction form
   2,113.50/2,915.40 = 1,326.18/x
3. Step 3: Cross multiply
   2,113.50x = 2,915.40 × 1,326.18
4. Step 4: Simplify right side
   2,113.50x = 3,866,345.17
5. Step 5: Solve for x
   x = 3,866,345.17/2,113.50
6. Step 6: Final answer
   x = 1,829.36