Finding the Fourth Proportional to 2,216.32, 3,318.72 and 1,525.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.32 : 3,318.72 = 1,525.12 : x
2. Step 2: Convert to fraction form
   2,216.32/3,318.72 = 1,525.12/x
3. Step 3: Cross multiply
   2,216.32x = 3,318.72 × 1,525.12
4. Step 4: Simplify right side
   2,216.32x = 5,061,446.25
5. Step 5: Solve for x
   x = 5,061,446.25/2,216.32
6. Step 6: Final answer
   x = 2,283.72