Finding the Fourth Proportional to 9,613.59, 13,267.22 and 5,421.75

Step by Step Solution

1. Step 1: Write the proportion equation
   9,613.59 : 13,267.22 = 5,421.75 : x
2. Step 2: Convert to fraction form
   9,613.59/13,267.22 = 5,421.75/x
3. Step 3: Cross multiply
   9,613.59x = 13,267.22 × 5,421.75
4. Step 4: Simplify right side
   9,613.59x = 71,931,522.93
5. Step 5: Solve for x
   x = 71,931,522.93/9,613.59
6. Step 6: Final answer
   x = 7,482.27