Finding the Fourth Proportional to 11,499.84, 15,866.94 and 7,021.92

Step by Step Solution

1. Step 1: Write the proportion equation
   11,499.84 : 15,866.94 = 7,021.92 : x
2. Step 2: Convert to fraction form
   11,499.84/15,866.94 = 7,021.92/x
3. Step 3: Cross multiply
   11,499.84x = 15,866.94 × 7,021.92
4. Step 4: Simplify right side
   11,499.84x = 111,416,383.32
5. Step 5: Solve for x
   x = 111,416,383.32/11,499.84
6. Step 6: Final answer
   x = 9,688.52