Finding the Fourth Proportional to 1,038.00, 1,431.78 and 618.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,038.00 : 1,431.78 = 618.03 : x
2. Step 2: Convert to fraction form
   1,038.00/1,431.78 = 618.03/x
3. Step 3: Cross multiply
   1,038.00x = 1,431.78 × 618.03
4. Step 4: Simplify right side
   1,038.00x = 884,883.48
5. Step 5: Solve for x
   x = 884,883.48/1,038.00
6. Step 6: Final answer
   x = 852.49