Finding the Fourth Proportional to 22,431.39, 30,955.32 and 13,005.42

Step by Step Solution

1. Step 1: Write the proportion equation
   22,431.39 : 30,955.32 = 13,005.42 : x
2. Step 2: Convert to fraction form
   22,431.39/30,955.32 = 13,005.42/x
3. Step 3: Cross multiply
   22,431.39x = 30,955.32 × 13,005.42
4. Step 4: Simplify right side
   22,431.39x = 402,586,937.83
5. Step 5: Solve for x
   x = 402,586,937.83/22,431.39
6. Step 6: Final answer
   x = 17,947.48