Finding the Fourth Proportional to 9,801.65, 13,526.57 and 5,611.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,801.65 : 13,526.57 = 5,611.25 : x
2. Step 2: Convert to fraction form
   9,801.65/13,526.57 = 5,611.25/x
3. Step 3: Cross multiply
   9,801.65x = 13,526.57 × 5,611.25
4. Step 4: Simplify right side
   9,801.65x = 75,900,912.31
5. Step 5: Solve for x
   x = 75,900,912.31/9,801.65
6. Step 6: Final answer
   x = 7,743.69