Finding the Fourth Proportional to 1,427.91, 2,138.83 and 932.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,427.91 : 2,138.83 = 932.56 : x
2. Step 2: Convert to fraction form
   1,427.91/2,138.83 = 932.56/x
3. Step 3: Cross multiply
   1,427.91x = 2,138.83 × 932.56
4. Step 4: Simplify right side
   1,427.91x = 1,994,587.30
5. Step 5: Solve for x
   x = 1,994,587.30/1,427.91
6. Step 6: Final answer
   x = 1,396.86