Finding the Fourth Proportional to 2,225.80, 3,071.88 and 1,231.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,225.80 : 3,071.88 = 1,231.39 : x
2. Step 2: Convert to fraction form
   2,225.80/3,071.88 = 1,231.39/x
3. Step 3: Cross multiply
   2,225.80x = 3,071.88 × 1,231.39
4. Step 4: Simplify right side
   2,225.80x = 3,782,682.31
5. Step 5: Solve for x
   x = 3,782,682.31/2,225.80
6. Step 6: Final answer
   x = 1,699.47