Finding the Fourth Proportional to 8,308.84, 12,434.01 and 5,190.32

Step by Step Solution

1. Step 1: Write the proportion equation
   8,308.84 : 12,434.01 = 5,190.32 : x
2. Step 2: Convert to fraction form
   8,308.84/12,434.01 = 5,190.32/x
3. Step 3: Cross multiply
   8,308.84x = 12,434.01 × 5,190.32
4. Step 4: Simplify right side
   8,308.84x = 64,536,414.98
5. Step 5: Solve for x
   x = 64,536,414.98/8,308.84
6. Step 6: Final answer
   x = 7,767.20