Finding the Fourth Proportional to 9,055.42, 12,495.96 and 5,279.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,055.42 : 12,495.96 = 5,279.20 : x
2. Step 2: Convert to fraction form
   9,055.42/12,495.96 = 5,279.20/x
3. Step 3: Cross multiply
   9,055.42x = 12,495.96 × 5,279.20
4. Step 4: Simplify right side
   9,055.42x = 65,968,640.79
5. Step 5: Solve for x
   x = 65,968,640.79/9,055.42
6. Step 6: Final answer
   x = 7,284.99