Finding the Fourth Proportional to 1,678.55, 2,316.35 and 932.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,678.55 : 2,316.35 = 932.54 : x
2. Step 2: Convert to fraction form
   1,678.55/2,316.35 = 932.54/x
3. Step 3: Cross multiply
   1,678.55x = 2,316.35 × 932.54
4. Step 4: Simplify right side
   1,678.55x = 2,160,079.78
5. Step 5: Solve for x
   x = 2,160,079.78/1,678.55
6. Step 6: Final answer
   x = 1,286.88