Finding the Fourth Proportional to 10,385.72, 15,581.01 and 4,146.14

Step by Step Solution

1. Step 1: Write the proportion equation
   10,385.72 : 15,581.01 = 4,146.14 : x
2. Step 2: Convert to fraction form
   10,385.72/15,581.01 = 4,146.14/x
3. Step 3: Cross multiply
   10,385.72x = 15,581.01 × 4,146.14
4. Step 4: Simplify right side
   10,385.72x = 64,601,048.80
5. Step 5: Solve for x
   x = 64,601,048.80/10,385.72
6. Step 6: Final answer
   x = 6,220.18