Finding the Fourth Proportional to 9,155.40, 13,737.69 and 3,612.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,155.40 : 13,737.69 = 3,612.72 : x
2. Step 2: Convert to fraction form
   9,155.40/13,737.69 = 3,612.72/x
3. Step 3: Cross multiply
   9,155.40x = 13,737.69 × 3,612.72
4. Step 4: Simplify right side
   9,155.40x = 49,630,427.42
5. Step 5: Solve for x
   x = 49,630,427.42/9,155.40
6. Step 6: Final answer
   x = 5,420.89