Finding the Fourth Proportional to 1,678.30, 2,315.72 and 932.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,678.30 : 2,315.72 = 932.02 : x
2. Step 2: Convert to fraction form
   1,678.30/2,315.72 = 932.02/x
3. Step 3: Cross multiply
   1,678.30x = 2,315.72 × 932.02
4. Step 4: Simplify right side
   1,678.30x = 2,158,297.35
5. Step 5: Solve for x
   x = 2,158,297.35/1,678.30
6. Step 6: Final answer
   x = 1,286.00