Finding the Fourth Proportional to 10,988.16, 16,478.76 and 3,590.91

Step by Step Solution

1. Step 1: Write the proportion equation
   10,988.16 : 16,478.76 = 3,590.91 : x
2. Step 2: Convert to fraction form
   10,988.16/16,478.76 = 3,590.91/x
3. Step 3: Cross multiply
   10,988.16x = 16,478.76 × 3,590.91
4. Step 4: Simplify right side
   10,988.16x = 59,173,744.07
5. Step 5: Solve for x
   x = 59,173,744.07/10,988.16
6. Step 6: Final answer
   x = 5,385.23