Finding the Fourth Proportional to 1,690.67, 2,330.89 and 1,292.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,690.67 : 2,330.89 = 1,292.58 : x
2. Step 2: Convert to fraction form
   1,690.67/2,330.89 = 1,292.58/x
3. Step 3: Cross multiply
   1,690.67x = 2,330.89 × 1,292.58
4. Step 4: Simplify right side
   1,690.67x = 3,012,858.56
5. Step 5: Solve for x
   x = 3,012,858.56/1,690.67
6. Step 6: Final answer
   x = 1,782.05