Finding the Fourth Proportional to 10,987.80, 16,470.06 and 3,590.28

Step by Step Solution

1. Step 1: Write the proportion equation
   10,987.80 : 16,470.06 = 3,590.28 : x
2. Step 2: Convert to fraction form
   10,987.80/16,470.06 = 3,590.28/x
3. Step 3: Cross multiply
   10,987.80x = 16,470.06 × 3,590.28
4. Step 4: Simplify right side
   10,987.80x = 59,132,127.02
5. Step 5: Solve for x
   x = 59,132,127.02/10,987.80
6. Step 6: Final answer
   x = 5,381.62