Finding the Fourth Proportional to 22,431.64, 30,956.72 and 13,005.40

Step by Step Solution

1. Step 1: Write the proportion equation
   22,431.64 : 30,956.72 = 13,005.40 : x
2. Step 2: Convert to fraction form
   22,431.64/30,956.72 = 13,005.40/x
3. Step 3: Cross multiply
   22,431.64x = 30,956.72 × 13,005.40
4. Step 4: Simplify right side
   22,431.64x = 402,604,526.29
5. Step 5: Solve for x
   x = 402,604,526.29/22,431.64
6. Step 6: Final answer
   x = 17,948.06