Finding the Fourth Proportional to 10,947.29, 16,421.13 and 3,156.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,947.29 : 16,421.13 = 3,156.10 : x
2. Step 2: Convert to fraction form
   10,947.29/16,421.13 = 3,156.10/x
3. Step 3: Cross multiply
   10,947.29x = 16,421.13 × 3,156.10
4. Step 4: Simplify right side
   10,947.29x = 51,826,687.34
5. Step 5: Solve for x
   x = 51,826,687.34/10,947.29
6. Step 6: Final answer
   x = 4,734.20