Finding the Fourth Proportional to 10,990.86, 16,475.94 and 3,590.16

Step by Step Solution

1. Step 1: Write the proportion equation
   10,990.86 : 16,475.94 = 3,590.16 : x
2. Step 2: Convert to fraction form
   10,990.86/16,475.94 = 3,590.16/x
3. Step 3: Cross multiply
   10,990.86x = 16,475.94 × 3,590.16
4. Step 4: Simplify right side
   10,990.86x = 59,151,260.75
5. Step 5: Solve for x
   x = 59,151,260.75/10,990.86
6. Step 6: Final answer
   x = 5,381.86