Finding the Fourth Proportional to 1,397.34, 2,097.09 and 985.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.34 : 2,097.09 = 985.59 : x
2. Step 2: Convert to fraction form
   1,397.34/2,097.09 = 985.59/x
3. Step 3: Cross multiply
   1,397.34x = 2,097.09 × 985.59
4. Step 4: Simplify right side
   1,397.34x = 2,066,870.93
5. Step 5: Solve for x
   x = 2,066,870.93/1,397.34
6. Step 6: Final answer
   x = 1,479.15