Finding the Fourth Proportional to 22,529.48, 31,090.35 and 12,457.69

Step by Step Solution

1. Step 1: Write the proportion equation
   22,529.48 : 31,090.35 = 12,457.69 : x
2. Step 2: Convert to fraction form
   22,529.48/31,090.35 = 12,457.69/x
3. Step 3: Cross multiply
   22,529.48x = 31,090.35 × 12,457.69
4. Step 4: Simplify right side
   22,529.48x = 387,314,016.09
5. Step 5: Solve for x
   x = 387,314,016.09/22,529.48
6. Step 6: Final answer
   x = 17,191.44