Finding the Fourth Proportional to 1,690.20, 2,329.56 and 1,667.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,690.20 : 2,329.56 = 1,667.52 : x
2. Step 2: Convert to fraction form
   1,690.20/2,329.56 = 1,667.52/x
3. Step 3: Cross multiply
   1,690.20x = 2,329.56 × 1,667.52
4. Step 4: Simplify right side
   1,690.20x = 3,884,587.89
5. Step 5: Solve for x
   x = 3,884,587.89/1,690.20
6. Step 6: Final answer
   x = 2,298.30