Finding the Fourth Proportional to 1,891.48, 2,612.24 and 1,685.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,891.48 : 2,612.24 = 1,685.34 : x
2. Step 2: Convert to fraction form
   1,891.48/2,612.24 = 1,685.34/x
3. Step 3: Cross multiply
   1,891.48x = 2,612.24 × 1,685.34
4. Step 4: Simplify right side
   1,891.48x = 4,402,491.07
5. Step 5: Solve for x
   x = 4,402,491.07/1,891.48
6. Step 6: Final answer
   x = 2,327.54