Finding the Fourth Proportional to 1,647.78, 2,471.69 and 552.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,647.78 : 2,471.69 = 552.12 : x
2. Step 2: Convert to fraction form
   1,647.78/2,471.69 = 552.12/x
3. Step 3: Cross multiply
   1,647.78x = 2,471.69 × 552.12
4. Step 4: Simplify right side
   1,647.78x = 1,364,666.72
5. Step 5: Solve for x
   x = 1,364,666.72/1,647.78
6. Step 6: Final answer
   x = 828.19