Finding the Fourth Proportional to 3,612.88, 4,985.28 and 2,196.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,612.88 : 4,985.28 = 2,196.86 : x
2. Step 2: Convert to fraction form
   3,612.88/4,985.28 = 2,196.86/x
3. Step 3: Cross multiply
   3,612.88x = 4,985.28 × 2,196.86
4. Step 4: Simplify right side
   3,612.88x = 10,951,962.22
5. Step 5: Solve for x
   x = 10,951,962.22/3,612.88
6. Step 6: Final answer
   x = 3,031.37