Finding the Fourth Proportional to 2,412.80, 3,615.72 and 2,152.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,412.80 : 3,615.72 = 2,152.16 : x
2. Step 2: Convert to fraction form
   2,412.80/3,615.72 = 2,152.16/x
3. Step 3: Cross multiply
   2,412.80x = 3,615.72 × 2,152.16
4. Step 4: Simplify right side
   2,412.80x = 7,781,607.96
5. Step 5: Solve for x
   x = 7,781,607.96/2,412.80
6. Step 6: Final answer
   x = 3,225.14