Finding the Fourth Proportional to 13,142.43, 19,712.03 and 5,351.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,142.43 : 19,712.03 = 5,351.31 : x
2. Step 2: Convert to fraction form
   13,142.43/19,712.03 = 5,351.31/x
3. Step 3: Cross multiply
   13,142.43x = 19,712.03 × 5,351.31
4. Step 4: Simplify right side
   13,142.43x = 105,485,156.50
5. Step 5: Solve for x
   x = 105,485,156.50/13,142.43
6. Step 6: Final answer
   x = 8,026.31