Finding the Fourth Proportional to 1,040.00, 1,560.65 and 553.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,040.00 : 1,560.65 = 553.37 : x
2. Step 2: Convert to fraction form
   1,040.00/1,560.65 = 553.37/x
3. Step 3: Cross multiply
   1,040.00x = 1,560.65 × 553.37
4. Step 4: Simplify right side
   1,040.00x = 863,606.32
5. Step 5: Solve for x
   x = 863,606.32/1,040.00
6. Step 6: Final answer
   x = 830.39