Finding the Fourth Proportional to 1,041.72, 1,561.46 and 554.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,041.72 : 1,561.46 = 554.28 : x
2. Step 2: Convert to fraction form
   1,041.72/1,561.46 = 554.28/x
3. Step 3: Cross multiply
   1,041.72x = 1,561.46 × 554.28
4. Step 4: Simplify right side
   1,041.72x = 865,486.05
5. Step 5: Solve for x
   x = 865,486.05/1,041.72
6. Step 6: Final answer
   x = 830.82