Finding the Fourth Proportional to 20,686.76, 31,023.94 and 7,536.05

Step by Step Solution

1. Step 1: Write the proportion equation
   20,686.76 : 31,023.94 = 7,536.05 : x
2. Step 2: Convert to fraction form
   20,686.76/31,023.94 = 7,536.05/x
3. Step 3: Cross multiply
   20,686.76x = 31,023.94 × 7,536.05
4. Step 4: Simplify right side
   20,686.76x = 233,797,963.04
5. Step 5: Solve for x
   x = 233,797,963.04/20,686.76
6. Step 6: Final answer
   x = 11,301.82