Finding the Fourth Proportional to 12,958.43, 19,431.50 and 7,410.29

Step by Step Solution

1. Step 1: Write the proportion equation
   12,958.43 : 19,431.50 = 7,410.29 : x
2. Step 2: Convert to fraction form
   12,958.43/19,431.50 = 7,410.29/x
3. Step 3: Cross multiply
   12,958.43x = 19,431.50 × 7,410.29
4. Step 4: Simplify right side
   12,958.43x = 143,992,915.93
5. Step 5: Solve for x
   x = 143,992,915.93/12,958.43
6. Step 6: Final answer
   x = 11,111.91