Finding the Fourth Proportional to 21,612, 32,418 and 5,196

Step by Step Solution

1. Step 1: Write the proportion equation
   21,612 : 32,418 = 5,196 : x
2. Step 2: Convert to fraction form
   21,612/32,418 = 5,196/x
3. Step 3: Cross multiply
   21,612x = 32,418 × 5,196
4. Step 4: Simplify right side
   21,612x = 168,443,928
5. Step 5: Solve for x
   x = 168,443,928/21,612
6. Step 6: Final answer
   x = 7,794