Finding the Fourth Proportional to 10,613.94, 15,921.72 and 3,219.01

Step by Step Solution

1. Step 1: Write the proportion equation
   10,613.94 : 15,921.72 = 3,219.01 : x
2. Step 2: Convert to fraction form
   10,613.94/15,921.72 = 3,219.01/x
3. Step 3: Cross multiply
   10,613.94x = 15,921.72 × 3,219.01
4. Step 4: Simplify right side
   10,613.94x = 51,252,175.90
5. Step 5: Solve for x
   x = 51,252,175.90/10,613.94
6. Step 6: Final answer
   x = 4,828.76