Finding the Fourth Proportional to 19,401.60, 29,105.10 and 8,308.20

Step by Step Solution

1. Step 1: Write the proportion equation
   19,401.60 : 29,105.10 = 8,308.20 : x
2. Step 2: Convert to fraction form
   19,401.60/29,105.10 = 8,308.20/x
3. Step 3: Cross multiply
   19,401.60x = 29,105.10 × 8,308.20
4. Step 4: Simplify right side
   19,401.60x = 241,810,991.82
5. Step 5: Solve for x
   x = 241,810,991.82/19,401.60
6. Step 6: Final answer
   x = 12,463.46