Finding the Fourth Proportional to 13,012, 19,520.46 and 5,221.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,012 : 19,520.46 = 5,221.42 : x
2. Step 2: Convert to fraction form
   13,012/19,520.46 = 5,221.42/x
3. Step 3: Cross multiply
   13,012x = 19,520.46 × 5,221.42
4. Step 4: Simplify right side
   13,012x = 101,924,520.25
5. Step 5: Solve for x
   x = 101,924,520.25/13,012
6. Step 6: Final answer
   x = 7,833.12