Finding the Fourth Proportional to 9,149.86, 13,722.72 and 5,453.14

Step by Step Solution

1. Step 1: Write the proportion equation
   9,149.86 : 13,722.72 = 5,453.14 : x
2. Step 2: Convert to fraction form
   9,149.86/13,722.72 = 5,453.14/x
3. Step 3: Cross multiply
   9,149.86x = 13,722.72 × 5,453.14
4. Step 4: Simplify right side
   9,149.86x = 74,831,913.34
5. Step 5: Solve for x
   x = 74,831,913.34/9,149.86
6. Step 6: Final answer
   x = 8,178.48