Finding the Fourth Proportional to 8,852.06, 12,215.86 and 5,315.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,852.06 : 12,215.86 = 5,315.31 : x
2. Step 2: Convert to fraction form
   8,852.06/12,215.86 = 5,315.31/x
3. Step 3: Cross multiply
   8,852.06x = 12,215.86 × 5,315.31
4. Step 4: Simplify right side
   8,852.06x = 64,931,069.53
5. Step 5: Solve for x
   x = 64,931,069.53/8,852.06
6. Step 6: Final answer
   x = 7,335.13