Finding the Fourth Proportional to 2,225.90, 3,336.69 and 926.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,225.90 : 3,336.69 = 926.12 : x
2. Step 2: Convert to fraction form
   2,225.90/3,336.69 = 926.12/x
3. Step 3: Cross multiply
   2,225.90x = 3,336.69 × 926.12
4. Step 4: Simplify right side
   2,225.90x = 3,090,175.34
5. Step 5: Solve for x
   x = 3,090,175.34/2,225.90
6. Step 6: Final answer
   x = 1,388.28