Finding the Fourth Proportional to 20,643.57, 30,965.94 and 5,061.18

Step by Step Solution

1. Step 1: Write the proportion equation
   20,643.57 : 30,965.94 = 5,061.18 : x
2. Step 2: Convert to fraction form
   20,643.57/30,965.94 = 5,061.18/x
3. Step 3: Cross multiply
   20,643.57x = 30,965.94 × 5,061.18
4. Step 4: Simplify right side
   20,643.57x = 156,724,196.21
5. Step 5: Solve for x
   x = 156,724,196.21/20,643.57
6. Step 6: Final answer
   x = 7,591.91