Finding the Fourth Proportional to 1,049.34, 1,573.08 and 678.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,049.34 : 1,573.08 = 678.15 : x
2. Step 2: Convert to fraction form
   1,049.34/1,573.08 = 678.15/x
3. Step 3: Cross multiply
   1,049.34x = 1,573.08 × 678.15
4. Step 4: Simplify right side
   1,049.34x = 1,066,784.20
5. Step 5: Solve for x
   x = 1,066,784.20/1,049.34
6. Step 6: Final answer
   x = 1,016.62