Finding the Fourth Proportional to 10,989.64, 15,165.71 and 5,953.89

Step by Step Solution

1. Step 1: Write the proportion equation
   10,989.64 : 15,165.71 = 5,953.89 : x
2. Step 2: Convert to fraction form
   10,989.64/15,165.71 = 5,953.89/x
3. Step 3: Cross multiply
   10,989.64x = 15,165.71 × 5,953.89
4. Step 4: Simplify right side
   10,989.64x = 90,294,996.21
5. Step 5: Solve for x
   x = 90,294,996.21/10,989.64
6. Step 6: Final answer
   x = 8,216.38