Finding the Fourth Proportional to 10,612.43, 15,916.04 and 3,856.91

Step by Step Solution

1. Step 1: Write the proportion equation
   10,612.43 : 15,916.04 = 3,856.91 : x
2. Step 2: Convert to fraction form
   10,612.43/15,916.04 = 3,856.91/x
3. Step 3: Cross multiply
   10,612.43x = 15,916.04 × 3,856.91
4. Step 4: Simplify right side
   10,612.43x = 61,386,733.84
5. Step 5: Solve for x
   x = 61,386,733.84/10,612.43
6. Step 6: Final answer
   x = 5,784.42