Finding the Fourth Proportional to 10,885.86, 16,318.80 and 3,955.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,885.86 : 16,318.80 = 3,955.50 : x
2. Step 2: Convert to fraction form
   10,885.86/16,318.80 = 3,955.50/x
3. Step 3: Cross multiply
   10,885.86x = 16,318.80 × 3,955.50
4. Step 4: Simplify right side
   10,885.86x = 64,549,013.40
5. Step 5: Solve for x
   x = 64,549,013.40/10,885.86
6. Step 6: Final answer
   x = 5,929.62