Finding the Fourth Proportional to 8,947.72, 13,406.42 and 5,477.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,947.72 : 13,406.42 = 5,477.72 : x
2. Step 2: Convert to fraction form
   8,947.72/13,406.42 = 5,477.72/x
3. Step 3: Cross multiply
   8,947.72x = 13,406.42 × 5,477.72
4. Step 4: Simplify right side
   8,947.72x = 73,436,614.96
5. Step 5: Solve for x
   x = 73,436,614.96/8,947.72
6. Step 6: Final answer
   x = 8,207.30