Finding the Fourth Proportional to 8,995.47, 12,415.35 and 5,641.15

Step by Step Solution

1. Step 1: Write the proportion equation
   8,995.47 : 12,415.35 = 5,641.15 : x
2. Step 2: Convert to fraction form
   8,995.47/12,415.35 = 5,641.15/x
3. Step 3: Cross multiply
   8,995.47x = 12,415.35 × 5,641.15
4. Step 4: Simplify right side
   8,995.47x = 70,036,851.65
5. Step 5: Solve for x
   x = 70,036,851.65/8,995.47
6. Step 6: Final answer
   x = 7,785.79