Finding the Fourth Proportional to 12,731.77, 19,108.59 and 7,190.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,731.77 : 19,108.59 = 7,190.56 : x
2. Step 2: Convert to fraction form
   12,731.77/19,108.59 = 7,190.56/x
3. Step 3: Cross multiply
   12,731.77x = 19,108.59 × 7,190.56
4. Step 4: Simplify right side
   12,731.77x = 137,401,462.91
5. Step 5: Solve for x
   x = 137,401,462.91/12,731.77
6. Step 6: Final answer
   x = 10,792.02