Finding the Fourth Proportional to 1,685.34, 2,523.15 and 1,243.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,685.34 : 2,523.15 = 1,243.62 : x
2. Step 2: Convert to fraction form
   1,685.34/2,523.15 = 1,243.62/x
3. Step 3: Cross multiply
   1,685.34x = 2,523.15 × 1,243.62
4. Step 4: Simplify right side
   1,685.34x = 3,137,839.80
5. Step 5: Solve for x
   x = 3,137,839.80/1,685.34
6. Step 6: Final answer
   x = 1,861.84