Finding the Fourth Proportional to 2,685.38, 3,703.83 and 2,153.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,685.38 : 3,703.83 = 2,153.68 : x
2. Step 2: Convert to fraction form
   2,685.38/3,703.83 = 2,153.68/x
3. Step 3: Cross multiply
   2,685.38x = 3,703.83 × 2,153.68
4. Step 4: Simplify right side
   2,685.38x = 7,976,864.59
5. Step 5: Solve for x
   x = 7,976,864.59/2,685.38
6. Step 6: Final answer
   x = 2,970.48