Finding the Fourth Proportional to 10,659, 15,991.56 and 3,640.62

Step by Step Solution

1. Step 1: Write the proportion equation
   10,659 : 15,991.56 = 3,640.62 : x
2. Step 2: Convert to fraction form
   10,659/15,991.56 = 3,640.62/x
3. Step 3: Cross multiply
   10,659x = 15,991.56 × 3,640.62
4. Step 4: Simplify right side
   10,659x = 58,219,193.17
5. Step 5: Solve for x
   x = 58,219,193.17/10,659
6. Step 6: Final answer
   x = 5,461.98