Finding the Fourth Proportional to 11,321.78, 16,985.03 and 3,424.86

Step by Step Solution

1. Step 1: Write the proportion equation
   11,321.78 : 16,985.03 = 3,424.86 : x
2. Step 2: Convert to fraction form
   11,321.78/16,985.03 = 3,424.86/x
3. Step 3: Cross multiply
   11,321.78x = 16,985.03 × 3,424.86
4. Step 4: Simplify right side
   11,321.78x = 58,171,332.72
5. Step 5: Solve for x
   x = 58,171,332.72/11,321.78
6. Step 6: Final answer
   x = 5,138.00