Finding the Fourth Proportional to 9,151.38, 13,722.15 and 2,909.70

Step by Step Solution

1. Step 1: Write the proportion equation
   9,151.38 : 13,722.15 = 2,909.70 : x
2. Step 2: Convert to fraction form
   9,151.38/13,722.15 = 2,909.70/x
3. Step 3: Cross multiply
   9,151.38x = 13,722.15 × 2,909.70
4. Step 4: Simplify right side
   9,151.38x = 39,927,339.86
5. Step 5: Solve for x
   x = 39,927,339.86/9,151.38
6. Step 6: Final answer
   x = 4,362.99