Finding the Fourth Proportional to 1,685.43, 2,526.45 and 807.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,685.43 : 2,526.45 = 807.69 : x
2. Step 2: Convert to fraction form
   1,685.43/2,526.45 = 807.69/x
3. Step 3: Cross multiply
   1,685.43x = 2,526.45 × 807.69
4. Step 4: Simplify right side
   1,685.43x = 2,040,588.40
5. Step 5: Solve for x
   x = 2,040,588.40/1,685.43
6. Step 6: Final answer
   x = 1,210.72