Finding the Fourth Proportional to 9,825.01, 13,528.49 and 7,405.89

Step by Step Solution

1. Step 1: Write the proportion equation
   9,825.01 : 13,528.49 = 7,405.89 : x
2. Step 2: Convert to fraction form
   9,825.01/13,528.49 = 7,405.89/x
3. Step 3: Cross multiply
   9,825.01x = 13,528.49 × 7,405.89
4. Step 4: Simplify right side
   9,825.01x = 100,190,561.14
5. Step 5: Solve for x
   x = 100,190,561.14/9,825.01
6. Step 6: Final answer
   x = 10,197.50