Finding the Fourth Proportional to 9,015.59, 12,445.35 and 5,479.94

Step by Step Solution

1. Step 1: Write the proportion equation
   9,015.59 : 12,445.35 = 5,479.94 : x
2. Step 2: Convert to fraction form
   9,015.59/12,445.35 = 5,479.94/x
3. Step 3: Cross multiply
   9,015.59x = 12,445.35 × 5,479.94
4. Step 4: Simplify right side
   9,015.59x = 68,199,771.28
5. Step 5: Solve for x
   x = 68,199,771.28/9,015.59
6. Step 6: Final answer
   x = 7,564.65