Finding the Fourth Proportional to 1,557.30, 2,149.06 and 849.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,557.30 : 2,149.06 = 849.15 : x
2. Step 2: Convert to fraction form
   1,557.30/2,149.06 = 849.15/x
3. Step 3: Cross multiply
   1,557.30x = 2,149.06 × 849.15
4. Step 4: Simplify right side
   1,557.30x = 1,824,869.03
5. Step 5: Solve for x
   x = 1,824,869.03/1,557.30
6. Step 6: Final answer
   x = 1,171.82