Finding the Fourth Proportional to 1,384.27, 2,074.82 and 690.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.27 : 2,074.82 = 690.23 : x
2. Step 2: Convert to fraction form
   1,384.27/2,074.82 = 690.23/x
3. Step 3: Cross multiply
   1,384.27x = 2,074.82 × 690.23
4. Step 4: Simplify right side
   1,384.27x = 1,432,104.74
5. Step 5: Solve for x
   x = 1,432,104.74/1,384.27
6. Step 6: Final answer
   x = 1,034.56