Finding the Fourth Proportional to 10,612.72, 15,908.12 and 4,771

Step by Step Solution

1. Step 1: Write the proportion equation
   10,612.72 : 15,908.12 = 4,771 : x
2. Step 2: Convert to fraction form
   10,612.72/15,908.12 = 4,771/x
3. Step 3: Cross multiply
   10,612.72x = 15,908.12 × 4,771
4. Step 4: Simplify right side
   10,612.72x = 75,897,640.52
5. Step 5: Solve for x
   x = 75,897,640.52/10,612.72
6. Step 6: Final answer
   x = 7,151.57