Finding the Fourth Proportional to 1,047.78, 1,445.90 and 582.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.78 : 1,445.90 = 582.02 : x
2. Step 2: Convert to fraction form
   1,047.78/1,445.90 = 582.02/x
3. Step 3: Cross multiply
   1,047.78x = 1,445.90 × 582.02
4. Step 4: Simplify right side
   1,047.78x = 841,542.72
5. Step 5: Solve for x
   x = 841,542.72/1,047.78
6. Step 6: Final answer
   x = 803.17