Finding the Fourth Proportional to 1,690.90, 2,333.32 and 1,292.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,690.90 : 2,333.32 = 1,292.83 : x
2. Step 2: Convert to fraction form
   1,690.90/2,333.32 = 1,292.83/x
3. Step 3: Cross multiply
   1,690.90x = 2,333.32 × 1,292.83
4. Step 4: Simplify right side
   1,690.90x = 3,016,586.10
5. Step 5: Solve for x
   x = 3,016,586.10/1,690.90
6. Step 6: Final answer
   x = 1,784.01