Finding the Fourth Proportional to 8,643.52, 12,970.32 and 3,645.59

Step by Step Solution

1. Step 1: Write the proportion equation
   8,643.52 : 12,970.32 = 3,645.59 : x
2. Step 2: Convert to fraction form
   8,643.52/12,970.32 = 3,645.59/x
3. Step 3: Cross multiply
   8,643.52x = 12,970.32 × 3,645.59
4. Step 4: Simplify right side
   8,643.52x = 47,284,468.89
5. Step 5: Solve for x
   x = 47,284,468.89/8,643.52
6. Step 6: Final answer
   x = 5,470.51