Finding the Fourth Proportional to 22,530, 31,090.06 and 12,457.65

Step by Step Solution

1. Step 1: Write the proportion equation
   22,530 : 31,090.06 = 12,457.65 : x
2. Step 2: Convert to fraction form
   22,530/31,090.06 = 12,457.65/x
3. Step 3: Cross multiply
   22,530x = 31,090.06 × 12,457.65
4. Step 4: Simplify right side
   22,530x = 387,309,085.96
5. Step 5: Solve for x
   x = 387,309,085.96/22,530
6. Step 6: Final answer
   x = 17,190.82