Finding the Fourth Proportional to 22,143.32, 30,561.72 and 13,196

Step by Step Solution

1. Step 1: Write the proportion equation
   22,143.32 : 30,561.72 = 13,196 : x
2. Step 2: Convert to fraction form
   22,143.32/30,561.72 = 13,196/x
3. Step 3: Cross multiply
   22,143.32x = 30,561.72 × 13,196
4. Step 4: Simplify right side
   22,143.32x = 403,292,457.12
5. Step 5: Solve for x
   x = 403,292,457.12/22,143.32
6. Step 6: Final answer
   x = 18,212.83