Finding the Fourth Proportional to 2,098.70, 2,895.72 and 1,312.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,098.70 : 2,895.72 = 1,312.20 : x
2. Step 2: Convert to fraction form
   2,098.70/2,895.72 = 1,312.20/x
3. Step 3: Cross multiply
   2,098.70x = 2,895.72 × 1,312.20
4. Step 4: Simplify right side
   2,098.70x = 3,799,763.78
5. Step 5: Solve for x
   x = 3,799,763.78/2,098.70
6. Step 6: Final answer
   x = 1,810.53