Finding the Fourth Proportional to 22,912, 31,613.76 and 13,481.60

Step by Step Solution

1. Step 1: Write the proportion equation
   22,912 : 31,613.76 = 13,481.60 : x
2. Step 2: Convert to fraction form
   22,912/31,613.76 = 13,481.60/x
3. Step 3: Cross multiply
   22,912x = 31,613.76 × 13,481.60
4. Step 4: Simplify right side
   22,912x = 426,204,066.82
5. Step 5: Solve for x
   x = 426,204,066.82/22,912
6. Step 6: Final answer
   x = 18,601.78