Finding the Fourth Proportional to 1,225.32, 1,826.16 and 1,215.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,225.32 : 1,826.16 = 1,215.12 : x
2. Step 2: Convert to fraction form
   1,225.32/1,826.16 = 1,215.12/x
3. Step 3: Cross multiply
   1,225.32x = 1,826.16 × 1,215.12
4. Step 4: Simplify right side
   1,225.32x = 2,219,003.54
5. Step 5: Solve for x
   x = 2,219,003.54/1,225.32
6. Step 6: Final answer
   x = 1,810.96