Finding the Fourth Proportional to 8,645.92, 12,970.52 and 3,380.69

Step by Step Solution

1. Step 1: Write the proportion equation
   8,645.92 : 12,970.52 = 3,380.69 : x
2. Step 2: Convert to fraction form
   8,645.92/12,970.52 = 3,380.69/x
3. Step 3: Cross multiply
   8,645.92x = 12,970.52 × 3,380.69
4. Step 4: Simplify right side
   8,645.92x = 43,849,307.26
5. Step 5: Solve for x
   x = 43,849,307.26/8,645.92
6. Step 6: Final answer
   x = 5,071.68