Finding the Fourth Proportional to 22,131, 30,538.62 and 13,176.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,131 : 30,538.62 = 13,176.72 : x
2. Step 2: Convert to fraction form
   22,131/30,538.62 = 13,176.72/x
3. Step 3: Cross multiply
   22,131x = 30,538.62 × 13,176.72
4. Step 4: Simplify right side
   22,131x = 402,398,844.93
5. Step 5: Solve for x
   x = 402,398,844.93/22,131
6. Step 6: Final answer
   x = 18,182.59