Finding the Fourth Proportional to 21,131.70, 31,697.52 and 6,340.59

Step by Step Solution

1. Step 1: Write the proportion equation
   21,131.70 : 31,697.52 = 6,340.59 : x
2. Step 2: Convert to fraction form
   21,131.70/31,697.52 = 6,340.59/x
3. Step 3: Cross multiply
   21,131.70x = 31,697.52 × 6,340.59
4. Step 4: Simplify right side
   21,131.70x = 200,980,978.34
5. Step 5: Solve for x
   x = 200,980,978.34/21,131.70
6. Step 6: Final answer
   x = 9,510.88