Finding the Fourth Proportional to 7,479.98, 10,247.61 and 7,199.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,479.98 : 10,247.61 = 7,199.72 : x
2. Step 2: Convert to fraction form
   7,479.98/10,247.61 = 7,199.72/x
3. Step 3: Cross multiply
   7,479.98x = 10,247.61 × 7,199.72
4. Step 4: Simplify right side
   7,479.98x = 73,779,922.67
5. Step 5: Solve for x
   x = 73,779,922.67/7,479.98
6. Step 6: Final answer
   x = 9,863.65