Finding the Fourth Proportional to 22,993.57, 31,725.59 and 13,428.03

Step by Step Solution

1. Step 1: Write the proportion equation
   22,993.57 : 31,725.59 = 13,428.03 : x
2. Step 2: Convert to fraction form
   22,993.57/31,725.59 = 13,428.03/x
3. Step 3: Cross multiply
   22,993.57x = 31,725.59 × 13,428.03
4. Step 4: Simplify right side
   22,993.57x = 426,012,066.55
5. Step 5: Solve for x
   x = 426,012,066.55/22,993.57
6. Step 6: Final answer
   x = 18,527.44