Finding the Fourth Proportional to 13,222.76, 18,247.89 and 7,847.98

Step by Step Solution

1. Step 1: Write the proportion equation
   13,222.76 : 18,247.89 = 7,847.98 : x
2. Step 2: Convert to fraction form
   13,222.76/18,247.89 = 7,847.98/x
3. Step 3: Cross multiply
   13,222.76x = 18,247.89 × 7,847.98
4. Step 4: Simplify right side
   13,222.76x = 143,209,059.57
5. Step 5: Solve for x
   x = 143,209,059.57/13,222.76
6. Step 6: Final answer
   x = 10,830.50