Finding the Fourth Proportional to 2,225.67, 3,071.31 and 1,230.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,225.67 : 3,071.31 = 1,230.89 : x
2. Step 2: Convert to fraction form
   2,225.67/3,071.31 = 1,230.89/x
3. Step 3: Cross multiply
   2,225.67x = 3,071.31 × 1,230.89
4. Step 4: Simplify right side
   2,225.67x = 3,780,423.25
5. Step 5: Solve for x
   x = 3,780,423.25/2,225.67
6. Step 6: Final answer
   x = 1,698.55