Finding the Fourth Proportional to 2,225.40, 3,071.06 and 1,230.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,225.40 : 3,071.06 = 1,230.69 : x
2. Step 2: Convert to fraction form
   2,225.40/3,071.06 = 1,230.69/x
3. Step 3: Cross multiply
   2,225.40x = 3,071.06 × 1,230.69
4. Step 4: Simplify right side
   2,225.40x = 3,779,509.78
5. Step 5: Solve for x
   x = 3,779,509.78/2,225.40
6. Step 6: Final answer
   x = 1,698.35