Finding the Fourth Proportional to 8,298.45, 12,434.71 and 5,213.97

Step by Step Solution

1. Step 1: Write the proportion equation
   8,298.45 : 12,434.71 = 5,213.97 : x
2. Step 2: Convert to fraction form
   8,298.45/12,434.71 = 5,213.97/x
3. Step 3: Cross multiply
   8,298.45x = 12,434.71 × 5,213.97
4. Step 4: Simplify right side
   8,298.45x = 64,834,204.90
5. Step 5: Solve for x
   x = 64,834,204.90/8,298.45
6. Step 6: Final answer
   x = 7,812.81