Finding the Fourth Proportional to 2,527.50, 3,489.78 and 1,690.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,527.50 : 3,489.78 = 1,690.07 : x
2. Step 2: Convert to fraction form
   2,527.50/3,489.78 = 1,690.07/x
3. Step 3: Cross multiply
   2,527.50x = 3,489.78 × 1,690.07
4. Step 4: Simplify right side
   2,527.50x = 5,897,961.37
5. Step 5: Solve for x
   x = 5,897,961.37/2,527.50
6. Step 6: Final answer
   x = 2,333.51