Finding the Fourth Proportional to 11,803.92, 16,290.56 and 6,499.80

Step by Step Solution

1. Step 1: Write the proportion equation
   11,803.92 : 16,290.56 = 6,499.80 : x
2. Step 2: Convert to fraction form
   11,803.92/16,290.56 = 6,499.80/x
3. Step 3: Cross multiply
   11,803.92x = 16,290.56 × 6,499.80
4. Step 4: Simplify right side
   11,803.92x = 105,885,381.89
5. Step 5: Solve for x
   x = 105,885,381.89/11,803.92
6. Step 6: Final answer
   x = 8,970.36