Finding the Fourth Proportional to 10,612.62, 15,916.83 and 3,215.34

Step by Step Solution

1. Step 1: Write the proportion equation
   10,612.62 : 15,916.83 = 3,215.34 : x
2. Step 2: Convert to fraction form
   10,612.62/15,916.83 = 3,215.34/x
3. Step 3: Cross multiply
   10,612.62x = 15,916.83 × 3,215.34
4. Step 4: Simplify right side
   10,612.62x = 51,178,020.17
5. Step 5: Solve for x
   x = 51,178,020.17/10,612.62
6. Step 6: Final answer
   x = 4,822.37