Finding the Fourth Proportional to 22,528.56, 31,088.64 and 12,457.56

Step by Step Solution

1. Step 1: Write the proportion equation
   22,528.56 : 31,088.64 = 12,457.56 : x
2. Step 2: Convert to fraction form
   22,528.56/31,088.64 = 12,457.56/x
3. Step 3: Cross multiply
   22,528.56x = 31,088.64 × 12,457.56
4. Step 4: Simplify right side
   22,528.56x = 387,288,598.12
5. Step 5: Solve for x
   x = 387,288,598.12/22,528.56
6. Step 6: Final answer
   x = 17,191.01