Finding the Fourth Proportional to 1,679.50, 2,317.34 and 971.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,679.50 : 2,317.34 = 971.34 : x
2. Step 2: Convert to fraction form
   1,679.50/2,317.34 = 971.34/x
3. Step 3: Cross multiply
   1,679.50x = 2,317.34 × 971.34
4. Step 4: Simplify right side
   1,679.50x = 2,250,925.04
5. Step 5: Solve for x
   x = 2,250,925.04/1,679.50
6. Step 6: Final answer
   x = 1,340.24