Finding the Fourth Proportional to 10,985.42, 16,480.67 and 3,590.43

Step by Step Solution

1. Step 1: Write the proportion equation
   10,985.42 : 16,480.67 = 3,590.43 : x
2. Step 2: Convert to fraction form
   10,985.42/16,480.67 = 3,590.43/x
3. Step 3: Cross multiply
   10,985.42x = 16,480.67 × 3,590.43
4. Step 4: Simplify right side
   10,985.42x = 59,172,612.23
5. Step 5: Solve for x
   x = 59,172,612.23/10,985.42
6. Step 6: Final answer
   x = 5,386.47