Finding the Fourth Proportional to 7,148.97, 9,864.32 and 4,315.59

Step by Step Solution

1. Step 1: Write the proportion equation
   7,148.97 : 9,864.32 = 4,315.59 : x
2. Step 2: Convert to fraction form
   7,148.97/9,864.32 = 4,315.59/x
3. Step 3: Cross multiply
   7,148.97x = 9,864.32 × 4,315.59
4. Step 4: Simplify right side
   7,148.97x = 42,570,339.17
5. Step 5: Solve for x
   x = 42,570,339.17/7,148.97
6. Step 6: Final answer
   x = 5,954.75