Finding the Fourth Proportional to 22,431.36, 30,956.32 and 13,002.88

Step by Step Solution

1. Step 1: Write the proportion equation
   22,431.36 : 30,956.32 = 13,002.88 : x
2. Step 2: Convert to fraction form
   22,431.36/30,956.32 = 13,002.88/x
3. Step 3: Cross multiply
   22,431.36x = 30,956.32 × 13,002.88
4. Step 4: Simplify right side
   22,431.36x = 402,521,314.20
5. Step 5: Solve for x
   x = 402,521,314.20/22,431.36
6. Step 6: Final answer
   x = 17,944.58