Finding the Fourth Proportional to 1,017.31, 1,404.06 and 971.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.31 : 1,404.06 = 971.14 : x
2. Step 2: Convert to fraction form
   1,017.31/1,404.06 = 971.14/x
3. Step 3: Cross multiply
   1,017.31x = 1,404.06 × 971.14
4. Step 4: Simplify right side
   1,017.31x = 1,363,538.83
5. Step 5: Solve for x
   x = 1,363,538.83/1,017.31
6. Step 6: Final answer
   x = 1,340.34