Finding the Fourth Proportional to 9,513.72, 13,128.84 and 5,535

Step by Step Solution

1. Step 1: Write the proportion equation
   9,513.72 : 13,128.84 = 5,535 : x
2. Step 2: Convert to fraction form
   9,513.72/13,128.84 = 5,535/x
3. Step 3: Cross multiply
   9,513.72x = 13,128.84 × 5,535
4. Step 4: Simplify right side
   9,513.72x = 72,668,129.40
5. Step 5: Solve for x
   x = 72,668,129.40/9,513.72
6. Step 6: Final answer
   x = 7,638.25