Finding the Fourth Proportional to 22,908.45, 31,613.40 and 12,837.30

Step by Step Solution

1. Step 1: Write the proportion equation
   22,908.45 : 31,613.40 = 12,837.30 : x
2. Step 2: Convert to fraction form
   22,908.45/31,613.40 = 12,837.30/x
3. Step 3: Cross multiply
   22,908.45x = 31,613.40 × 12,837.30
4. Step 4: Simplify right side
   22,908.45x = 405,830,699.82
5. Step 5: Solve for x
   x = 405,830,699.82/22,908.45
6. Step 6: Final answer
   x = 17,715.33