Finding the Fourth Proportional to 22,451.77, 30,986.31 and 13,020.13

Step by Step Solution

1. Step 1: Write the proportion equation
   22,451.77 : 30,986.31 = 13,020.13 : x
2. Step 2: Convert to fraction form
   22,451.77/30,986.31 = 13,020.13/x
3. Step 3: Cross multiply
   22,451.77x = 30,986.31 × 13,020.13
4. Step 4: Simplify right side
   22,451.77x = 403,445,784.42
5. Step 5: Solve for x
   x = 403,445,784.42/22,451.77
6. Step 6: Final answer
   x = 17,969.44