Finding the Fourth Proportional to 11,222.89, 15,472.69 and 7,679.95

Step by Step Solution

1. Step 1: Write the proportion equation
   11,222.89 : 15,472.69 = 7,679.95 : x
2. Step 2: Convert to fraction form
   11,222.89/15,472.69 = 7,679.95/x
3. Step 3: Cross multiply
   11,222.89x = 15,472.69 × 7,679.95
4. Step 4: Simplify right side
   11,222.89x = 118,829,427.68
5. Step 5: Solve for x
   x = 118,829,427.68/11,222.89
6. Step 6: Final answer
   x = 10,588.13