Finding the Fourth Proportional to 11,783.69, 16,261.72 and 6,479

Step by Step Solution

1. Step 1: Write the proportion equation
   11,783.69 : 16,261.72 = 6,479 : x
2. Step 2: Convert to fraction form
   11,783.69/16,261.72 = 6,479/x
3. Step 3: Cross multiply
   11,783.69x = 16,261.72 × 6,479
4. Step 4: Simplify right side
   11,783.69x = 105,359,683.88
5. Step 5: Solve for x
   x = 105,359,683.88/11,783.69
6. Step 6: Final answer
   x = 8,941.15