Finding the Fourth Proportional to 9,901.30, 13,660.43 and 5,649.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,901.30 : 13,660.43 = 5,649.31 : x
2. Step 2: Convert to fraction form
   9,901.30/13,660.43 = 5,649.31/x
3. Step 3: Cross multiply
   9,901.30x = 13,660.43 × 5,649.31
4. Step 4: Simplify right side
   9,901.30x = 77,171,907.25
5. Step 5: Solve for x
   x = 77,171,907.25/9,901.30
6. Step 6: Final answer
   x = 7,794.12