Finding the Fourth Proportional to 1,690.71, 2,333.18 and 1,194.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,690.71 : 2,333.18 = 1,194.21 : x
2. Step 2: Convert to fraction form
   1,690.71/2,333.18 = 1,194.21/x
3. Step 3: Cross multiply
   1,690.71x = 2,333.18 × 1,194.21
4. Step 4: Simplify right side
   1,690.71x = 2,786,306.89
5. Step 5: Solve for x
   x = 2,786,306.89/1,690.71
6. Step 6: Final answer
   x = 1,648.01