Finding the Fourth Proportional to 30,648.56, 45,971.90 and 8,463.28

Step by Step Solution

1. Step 1: Write the proportion equation
   30,648.56 : 45,971.90 = 8,463.28 : x
2. Step 2: Convert to fraction form
   30,648.56/45,971.90 = 8,463.28/x
3. Step 3: Cross multiply
   30,648.56x = 45,971.90 × 8,463.28
4. Step 4: Simplify right side
   30,648.56x = 389,073,061.83
5. Step 5: Solve for x
   x = 389,073,061.83/30,648.56
6. Step 6: Final answer
   x = 12,694.66