Finding the Fourth Proportional to 11,020.86, 16,521.57 and 4,090.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,020.86 : 16,521.57 = 4,090.50 : x
2. Step 2: Convert to fraction form
   11,020.86/16,521.57 = 4,090.50/x
3. Step 3: Cross multiply
   11,020.86x = 16,521.57 × 4,090.50
4. Step 4: Simplify right side
   11,020.86x = 67,581,482.09
5. Step 5: Solve for x
   x = 67,581,482.09/11,020.86
6. Step 6: Final answer
   x = 6,132.14