Finding the Fourth Proportional to 9,418.32, 12,995.96 and 5,640.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,418.32 : 12,995.96 = 5,640.60 : x
2. Step 2: Convert to fraction form
   9,418.32/12,995.96 = 5,640.60/x
3. Step 3: Cross multiply
   9,418.32x = 12,995.96 × 5,640.60
4. Step 4: Simplify right side
   9,418.32x = 73,304,983.77
5. Step 5: Solve for x
   x = 73,304,983.77/9,418.32
6. Step 6: Final answer
   x = 7,783.23