Finding the Fourth Proportional to 10,575.20, 14,599.76 and 7,222.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,575.20 : 14,599.76 = 7,222.88 : x
2. Step 2: Convert to fraction form
   10,575.20/14,599.76 = 7,222.88/x
3. Step 3: Cross multiply
   10,575.20x = 14,599.76 × 7,222.88
4. Step 4: Simplify right side
   10,575.20x = 105,452,314.51
5. Step 5: Solve for x
   x = 105,452,314.51/10,575.20
6. Step 6: Final answer
   x = 9,971.66