Finding the Fourth Proportional to 1,685.79, 2,528.37 and 1,141.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,685.79 : 2,528.37 = 1,141.47 : x
2. Step 2: Convert to fraction form
   1,685.79/2,528.37 = 1,141.47/x
3. Step 3: Cross multiply
   1,685.79x = 2,528.37 × 1,141.47
4. Step 4: Simplify right side
   1,685.79x = 2,886,058.50
5. Step 5: Solve for x
   x = 2,886,058.50/1,685.79
6. Step 6: Final answer
   x = 1,711.99