Finding the Fourth Proportional to 2,089.80, 3,131.10 and 1,114.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,089.80 : 3,131.10 = 1,114.92 : x
2. Step 2: Convert to fraction form
   2,089.80/3,131.10 = 1,114.92/x
3. Step 3: Cross multiply
   2,089.80x = 3,131.10 × 1,114.92
4. Step 4: Simplify right side
   2,089.80x = 3,490,926.01
5. Step 5: Solve for x
   x = 3,490,926.01/2,089.80
6. Step 6: Final answer
   x = 1,670.46