Finding the Fourth Proportional to 21,627.50, 32,441.28 and 5,211.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,627.50 : 32,441.28 = 5,211.50 : x
2. Step 2: Convert to fraction form
   21,627.50/32,441.28 = 5,211.50/x
3. Step 3: Cross multiply
   21,627.50x = 32,441.28 × 5,211.50
4. Step 4: Simplify right side
   21,627.50x = 169,067,730.72
5. Step 5: Solve for x
   x = 169,067,730.72/21,627.50
6. Step 6: Final answer
   x = 7,817.26