Finding the Fourth Proportional to 14,395.35, 21,574.86 and 7,715.28

Step by Step Solution

1. Step 1: Write the proportion equation
   14,395.35 : 21,574.86 = 7,715.28 : x
2. Step 2: Convert to fraction form
   14,395.35/21,574.86 = 7,715.28/x
3. Step 3: Cross multiply
   14,395.35x = 21,574.86 × 7,715.28
4. Step 4: Simplify right side
   14,395.35x = 166,456,085.86
5. Step 5: Solve for x
   x = 166,456,085.86/14,395.35
6. Step 6: Final answer
   x = 11,563.18