Finding the Fourth Proportional to 1,697.13, 2,339.82 and 1,225.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,697.13 : 2,339.82 = 1,225.71 : x
2. Step 2: Convert to fraction form
   1,697.13/2,339.82 = 1,225.71/x
3. Step 3: Cross multiply
   1,697.13x = 2,339.82 × 1,225.71
4. Step 4: Simplify right side
   1,697.13x = 2,867,940.77
5. Step 5: Solve for x
   x = 2,867,940.77/1,697.13
6. Step 6: Final answer
   x = 1,689.88