Finding the Fourth Proportional to 10,899.36, 16,345.80 and 3,972.24

Step by Step Solution

1. Step 1: Write the proportion equation
   10,899.36 : 16,345.80 = 3,972.24 : x
2. Step 2: Convert to fraction form
   10,899.36/16,345.80 = 3,972.24/x
3. Step 3: Cross multiply
   10,899.36x = 16,345.80 × 3,972.24
4. Step 4: Simplify right side
   10,899.36x = 64,929,440.59
5. Step 5: Solve for x
   x = 64,929,440.59/10,899.36
6. Step 6: Final answer
   x = 5,957.18