Finding the Fourth Proportional to 8,364.45, 12,535.73 and 3,428.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,364.45 : 12,535.73 = 3,428.31 : x
2. Step 2: Convert to fraction form
   8,364.45/12,535.73 = 3,428.31/x
3. Step 3: Cross multiply
   8,364.45x = 12,535.73 × 3,428.31
4. Step 4: Simplify right side
   8,364.45x = 42,976,368.52
5. Step 5: Solve for x
   x = 42,976,368.52/8,364.45
6. Step 6: Final answer
   x = 5,137.98