Finding the Fourth Proportional to 1,397.58, 1,927.89 and 1,135.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.58 : 1,927.89 = 1,135.14 : x
2. Step 2: Convert to fraction form
   1,397.58/1,927.89 = 1,135.14/x
3. Step 3: Cross multiply
   1,397.58x = 1,927.89 × 1,135.14
4. Step 4: Simplify right side
   1,397.58x = 2,188,425.05
5. Step 5: Solve for x
   x = 2,188,425.05/1,397.58
6. Step 6: Final answer
   x = 1,565.87