Finding the Fourth Proportional to 2,225.91, 3,071.79 and 1,231.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,225.91 : 3,071.79 = 1,231.17 : x
2. Step 2: Convert to fraction form
   2,225.91/3,071.79 = 1,231.17/x
3. Step 3: Cross multiply
   2,225.91x = 3,071.79 × 1,231.17
4. Step 4: Simplify right side
   2,225.91x = 3,781,875.72
5. Step 5: Solve for x
   x = 3,781,875.72/2,225.91
6. Step 6: Final answer
   x = 1,699.02