Finding the Fourth Proportional to 9,613.10, 13,263.81 and 5,420.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,613.10 : 13,263.81 = 5,420.54 : x
2. Step 2: Convert to fraction form
   9,613.10/13,263.81 = 5,420.54/x
3. Step 3: Cross multiply
   9,613.10x = 13,263.81 × 5,420.54
4. Step 4: Simplify right side
   9,613.10x = 71,897,012.66
5. Step 5: Solve for x
   x = 71,897,012.66/9,613.10
6. Step 6: Final answer
   x = 7,479.07