Finding the Fourth Proportional to 1,678.10, 2,315.69 and 932.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,678.10 : 2,315.69 = 932.04 : x
2. Step 2: Convert to fraction form
   1,678.10/2,315.69 = 932.04/x
3. Step 3: Cross multiply
   1,678.10x = 2,315.69 × 932.04
4. Step 4: Simplify right side
   1,678.10x = 2,158,315.71
5. Step 5: Solve for x
   x = 2,158,315.71/1,678.10
6. Step 6: Final answer
   x = 1,286.17