Finding the Fourth Proportional to 1,690.49, 2,518.71 and 1,596.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,690.49 : 2,518.71 = 1,596.17 : x
2. Step 2: Convert to fraction form
   1,690.49/2,518.71 = 1,596.17/x
3. Step 3: Cross multiply
   1,690.49x = 2,518.71 × 1,596.17
4. Step 4: Simplify right side
   1,690.49x = 4,020,276.75
5. Step 5: Solve for x
   x = 4,020,276.75/1,690.49
6. Step 6: Final answer
   x = 2,378.18