Finding the Fourth Proportional to 2,215.38, 3,325.12 and 1,120.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.38 : 3,325.12 = 1,120.51 : x
2. Step 2: Convert to fraction form
   2,215.38/3,325.12 = 1,120.51/x
3. Step 3: Cross multiply
   2,215.38x = 3,325.12 × 1,120.51
4. Step 4: Simplify right side
   2,215.38x = 3,725,830.21
5. Step 5: Solve for x
   x = 3,725,830.21/2,215.38
6. Step 6: Final answer
   x = 1,681.80