Finding the Fourth Proportional to 1,389.46, 2,085.82 and 1,097.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,389.46 : 2,085.82 = 1,097.16 : x
2. Step 2: Convert to fraction form
   1,389.46/2,085.82 = 1,097.16/x
3. Step 3: Cross multiply
   1,389.46x = 2,085.82 × 1,097.16
4. Step 4: Simplify right side
   1,389.46x = 2,288,482.39
5. Step 5: Solve for x
   x = 2,288,482.39/1,389.46
6. Step 6: Final answer
   x = 1,647.03