Finding the Fourth Proportional to 11,212.01, 16,820.64 and 3,420.82

Step by Step Solution

1. Step 1: Write the proportion equation
   11,212.01 : 16,820.64 = 3,420.82 : x
2. Step 2: Convert to fraction form
   11,212.01/16,820.64 = 3,420.82/x
3. Step 3: Cross multiply
   11,212.01x = 16,820.64 × 3,420.82
4. Step 4: Simplify right side
   11,212.01x = 57,540,381.72
5. Step 5: Solve for x
   x = 57,540,381.72/11,212.01
6. Step 6: Final answer
   x = 5,132.03