Finding the Fourth Proportional to 10,947.48, 16,421.82 and 3,156.09

Step by Step Solution

1. Step 1: Write the proportion equation
   10,947.48 : 16,421.82 = 3,156.09 : x
2. Step 2: Convert to fraction form
   10,947.48/16,421.82 = 3,156.09/x
3. Step 3: Cross multiply
   10,947.48x = 16,421.82 × 3,156.09
4. Step 4: Simplify right side
   10,947.48x = 51,828,741.88
5. Step 5: Solve for x
   x = 51,828,741.88/10,947.48
6. Step 6: Final answer
   x = 4,734.31