Finding the Fourth Proportional to 1,617.31, 2,231.86 and 1,058.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,617.31 : 2,231.86 = 1,058.71 : x
2. Step 2: Convert to fraction form
   1,617.31/2,231.86 = 1,058.71/x
3. Step 3: Cross multiply
   1,617.31x = 2,231.86 × 1,058.71
4. Step 4: Simplify right side
   1,617.31x = 2,362,892.50
5. Step 5: Solve for x
   x = 2,362,892.50/1,617.31
6. Step 6: Final answer
   x = 1,461.00