Finding the Fourth Proportional to 2,146.32, 3,215.52 and 1,415.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,146.32 : 3,215.52 = 1,415.16 : x
2. Step 2: Convert to fraction form
   2,146.32/3,215.52 = 1,415.16/x
3. Step 3: Cross multiply
   2,146.32x = 3,215.52 × 1,415.16
4. Step 4: Simplify right side
   2,146.32x = 4,550,475.28
5. Step 5: Solve for x
   x = 4,550,475.28/2,146.32
6. Step 6: Final answer
   x = 2,120.13