Finding the Fourth Proportional to 1,375.43, 2,061.42 and 553.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.43 : 2,061.42 = 553.25 : x
2. Step 2: Convert to fraction form
   1,375.43/2,061.42 = 553.25/x
3. Step 3: Cross multiply
   1,375.43x = 2,061.42 × 553.25
4. Step 4: Simplify right side
   1,375.43x = 1,140,472.10
5. Step 5: Solve for x
   x = 1,140,472.10/1,375.43
6. Step 6: Final answer
   x = 829.17