Finding the Fourth Proportional to 11,835.20, 16,338.72 and 8,532.80

Step by Step Solution

1. Step 1: Write the proportion equation
   11,835.20 : 16,338.72 = 8,532.80 : x
2. Step 2: Convert to fraction form
   11,835.20/16,338.72 = 8,532.80/x
3. Step 3: Cross multiply
   11,835.20x = 16,338.72 × 8,532.80
4. Step 4: Simplify right side
   11,835.20x = 139,415,030.02
5. Step 5: Solve for x
   x = 139,415,030.02/11,835.20
6. Step 6: Final answer
   x = 11,779.69