Finding the Fourth Proportional to 1,611.30, 2,229.69 and 1,374.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,611.30 : 2,229.69 = 1,374.90 : x
2. Step 2: Convert to fraction form
   1,611.30/2,229.69 = 1,374.90/x
3. Step 3: Cross multiply
   1,611.30x = 2,229.69 × 1,374.90
4. Step 4: Simplify right side
   1,611.30x = 3,065,600.78
5. Step 5: Solve for x
   x = 3,065,600.78/1,611.30
6. Step 6: Final answer
   x = 1,902.56