Finding the Fourth Proportional to 40,401.76, 60,612.34 and 12,699.76

Step by Step Solution

1. Step 1: Write the proportion equation
   40,401.76 : 60,612.34 = 12,699.76 : x
2. Step 2: Convert to fraction form
   40,401.76/60,612.34 = 12,699.76/x
3. Step 3: Cross multiply
   40,401.76x = 60,612.34 × 12,699.76
4. Step 4: Simplify right side
   40,401.76x = 769,762,171.04
5. Step 5: Solve for x
   x = 769,762,171.04/40,401.76
6. Step 6: Final answer
   x = 19,052.69