Finding the Fourth Proportional to 22,618.98, 31,207.77 and 13,185.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,618.98 : 31,207.77 = 13,185.72 : x
2. Step 2: Convert to fraction form
   22,618.98/31,207.77 = 13,185.72/x
3. Step 3: Cross multiply
   22,618.98x = 31,207.77 × 13,185.72
4. Step 4: Simplify right side
   22,618.98x = 411,496,917.04
5. Step 5: Solve for x
   x = 411,496,917.04/22,618.98
6. Step 6: Final answer
   x = 18,192.55