Finding the Fourth Proportional to 1,659.32, 2,488.76 and 928.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,659.32 : 2,488.76 = 928.42 : x
2. Step 2: Convert to fraction form
   1,659.32/2,488.76 = 928.42/x
3. Step 3: Cross multiply
   1,659.32x = 2,488.76 × 928.42
4. Step 4: Simplify right side
   1,659.32x = 2,310,614.56
5. Step 5: Solve for x
   x = 2,310,614.56/1,659.32
6. Step 6: Final answer
   x = 1,392.51