Finding the Fourth Proportional to 1,397.32, 1,926.42 and 1,160.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.32 : 1,926.42 = 1,160.42 : x
2. Step 2: Convert to fraction form
   1,397.32/1,926.42 = 1,160.42/x
3. Step 3: Cross multiply
   1,397.32x = 1,926.42 × 1,160.42
4. Step 4: Simplify right side
   1,397.32x = 2,235,456.30
5. Step 5: Solve for x
   x = 2,235,456.30/1,397.32
6. Step 6: Final answer
   x = 1,599.82