Finding the Fourth Proportional to 8,380.38, 12,507.86 and 8,241.99

Step by Step Solution

1. Step 1: Write the proportion equation
   8,380.38 : 12,507.86 = 8,241.99 : x
2. Step 2: Convert to fraction form
   8,380.38/12,507.86 = 8,241.99/x
3. Step 3: Cross multiply
   8,380.38x = 12,507.86 × 8,241.99
4. Step 4: Simplify right side
   8,380.38x = 103,089,657.04
5. Step 5: Solve for x
   x = 103,089,657.04/8,380.38
6. Step 6: Final answer
   x = 12,301.31