Finding the Fourth Proportional to 1,393.32, 2,087.18 and 929.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.32 : 2,087.18 = 929.56 : x
2. Step 2: Convert to fraction form
   1,393.32/2,087.18 = 929.56/x
3. Step 3: Cross multiply
   1,393.32x = 2,087.18 × 929.56
4. Step 4: Simplify right side
   1,393.32x = 1,940,159.04
5. Step 5: Solve for x
   x = 1,940,159.04/1,393.32
6. Step 6: Final answer
   x = 1,392.47