Finding the Fourth Proportional to 2,528.91, 3,489.89 and 1,690.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,528.91 : 3,489.89 = 1,690.83 : x
2. Step 2: Convert to fraction form
   2,528.91/3,489.89 = 1,690.83/x
3. Step 3: Cross multiply
   2,528.91x = 3,489.89 × 1,690.83
4. Step 4: Simplify right side
   2,528.91x = 5,900,802.25
5. Step 5: Solve for x
   x = 5,900,802.25/2,528.91
6. Step 6: Final answer
   x = 2,333.34