Finding the Fourth Proportional to 22,528.51, 31,091.61 and 12,457.71

Step by Step Solution

1. Step 1: Write the proportion equation
   22,528.51 : 31,091.61 = 12,457.71 : x
2. Step 2: Convert to fraction form
   22,528.51/31,091.61 = 12,457.71/x
3. Step 3: Cross multiply
   22,528.51x = 31,091.61 × 12,457.71
4. Step 4: Simplify right side
   22,528.51x = 387,330,043.07
5. Step 5: Solve for x
   x = 387,330,043.07/22,528.51
6. Step 6: Final answer
   x = 17,192.89