Finding the Fourth Proportional to 10,985.72, 16,476.90 and 3,590.24

Step by Step Solution

1. Step 1: Write the proportion equation
   10,985.72 : 16,476.90 = 3,590.24 : x
2. Step 2: Convert to fraction form
   10,985.72/16,476.90 = 3,590.24/x
3. Step 3: Cross multiply
   10,985.72x = 16,476.90 × 3,590.24
4. Step 4: Simplify right side
   10,985.72x = 59,156,025.46
5. Step 5: Solve for x
   x = 59,156,025.46/10,985.72
6. Step 6: Final answer
   x = 5,384.81