Finding the Fourth Proportional to 1,101.72, 1,652.82 and 371.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,101.72 : 1,652.82 = 371.31 : x
2. Step 2: Convert to fraction form
   1,101.72/1,652.82 = 371.31/x
3. Step 3: Cross multiply
   1,101.72x = 1,652.82 × 371.31
4. Step 4: Simplify right side
   1,101.72x = 613,708.59
5. Step 5: Solve for x
   x = 613,708.59/1,101.72
6. Step 6: Final answer
   x = 557.05