Finding the Fourth Proportional to 11,490.76, 15,856.83 and 7,021.99

Step by Step Solution

1. Step 1: Write the proportion equation
   11,490.76 : 15,856.83 = 7,021.99 : x
2. Step 2: Convert to fraction form
   11,490.76/15,856.83 = 7,021.99/x
3. Step 3: Cross multiply
   11,490.76x = 15,856.83 × 7,021.99
4. Step 4: Simplify right side
   11,490.76x = 111,346,501.69
5. Step 5: Solve for x
   x = 111,346,501.69/11,490.76
6. Step 6: Final answer
   x = 9,690.09