Finding the Fourth Proportional to 2,225.56, 3,071.15 and 1,230.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,225.56 : 3,071.15 = 1,230.78 : x
2. Step 2: Convert to fraction form
   2,225.56/3,071.15 = 1,230.78/x
3. Step 3: Cross multiply
   2,225.56x = 3,071.15 × 1,230.78
4. Step 4: Simplify right side
   2,225.56x = 3,779,910.00
5. Step 5: Solve for x
   x = 3,779,910.00/2,225.56
6. Step 6: Final answer
   x = 1,698.41