Finding the Fourth Proportional to 22,816.50, 31,486.42 and 12,745.08

Step by Step Solution

1. Step 1: Write the proportion equation
   22,816.50 : 31,486.42 = 12,745.08 : x
2. Step 2: Convert to fraction form
   22,816.50/31,486.42 = 12,745.08/x
3. Step 3: Cross multiply
   22,816.50x = 31,486.42 × 12,745.08
4. Step 4: Simplify right side
   22,816.50x = 401,296,941.81
5. Step 5: Solve for x
   x = 401,296,941.81/22,816.50
6. Step 6: Final answer
   x = 17,588.01