Finding the Fourth Proportional to 1,685.67, 2,529.38 and 1,274.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,685.67 : 2,529.38 = 1,274.69 : x
2. Step 2: Convert to fraction form
   1,685.67/2,529.38 = 1,274.69/x
3. Step 3: Cross multiply
   1,685.67x = 2,529.38 × 1,274.69
4. Step 4: Simplify right side
   1,685.67x = 3,224,165.93
5. Step 5: Solve for x
   x = 3,224,165.93/1,685.67
6. Step 6: Final answer
   x = 1,912.69