Finding the Fourth Proportional to 1,614.69, 2,422.28 and 690.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,614.69 : 2,422.28 = 690.25 : x
2. Step 2: Convert to fraction form
   1,614.69/2,422.28 = 690.25/x
3. Step 3: Cross multiply
   1,614.69x = 2,422.28 × 690.25
4. Step 4: Simplify right side
   1,614.69x = 1,671,978.77
5. Step 5: Solve for x
   x = 1,671,978.77/1,614.69
6. Step 6: Final answer
   x = 1,035.48