Finding the Fourth Proportional to 9,815.77, 13,536.43 and 7,574.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,815.77 : 13,536.43 = 7,574.09 : x
2. Step 2: Convert to fraction form
   9,815.77/13,536.43 = 7,574.09/x
3. Step 3: Cross multiply
   9,815.77x = 13,536.43 × 7,574.09
4. Step 4: Simplify right side
   9,815.77x = 102,526,139.10
5. Step 5: Solve for x
   x = 102,526,139.10/9,815.77
6. Step 6: Final answer
   x = 10,445.04