Finding the Fourth Proportional to 9,801.76, 13,526.04 and 5,609.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,801.76 : 13,526.04 = 5,609.20 : x
2. Step 2: Convert to fraction form
   9,801.76/13,526.04 = 5,609.20/x
3. Step 3: Cross multiply
   9,801.76x = 13,526.04 × 5,609.20
4. Step 4: Simplify right side
   9,801.76x = 75,870,263.57
5. Step 5: Solve for x
   x = 75,870,263.57/9,801.76
6. Step 6: Final answer
   x = 7,740.47