Finding the Fourth Proportional to 1,314.09, 1,810.35 and 1,089.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,314.09 : 1,810.35 = 1,089.18 : x
2. Step 2: Convert to fraction form
   1,314.09/1,810.35 = 1,089.18/x
3. Step 3: Cross multiply
   1,314.09x = 1,810.35 × 1,089.18
4. Step 4: Simplify right side
   1,314.09x = 1,971,797.01
5. Step 5: Solve for x
   x = 1,971,797.01/1,314.09
6. Step 6: Final answer
   x = 1,500.50