Finding the Fourth Proportional to 1,373.88, 2,061.17 and 552.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,373.88 : 2,061.17 = 552.71 : x
2. Step 2: Convert to fraction form
   1,373.88/2,061.17 = 552.71/x
3. Step 3: Cross multiply
   1,373.88x = 2,061.17 × 552.71
4. Step 4: Simplify right side
   1,373.88x = 1,139,216.20
5. Step 5: Solve for x
   x = 1,139,216.20/1,373.88
6. Step 6: Final answer
   x = 829.20