Finding the Fourth Proportional to 1,604.40, 2,213.69 and 932.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,604.40 : 2,213.69 = 932.10 : x
2. Step 2: Convert to fraction form
   1,604.40/2,213.69 = 932.10/x
3. Step 3: Cross multiply
   1,604.40x = 2,213.69 × 932.10
4. Step 4: Simplify right side
   1,604.40x = 2,063,375.79
5. Step 5: Solve for x
   x = 2,063,375.79/1,604.40
6. Step 6: Final answer
   x = 1,286.07