Finding the Fourth Proportional to 10,857.56, 14,978.67 and 8,335.22

Step by Step Solution

1. Step 1: Write the proportion equation
   10,857.56 : 14,978.67 = 8,335.22 : x
2. Step 2: Convert to fraction form
   10,857.56/14,978.67 = 8,335.22/x
3. Step 3: Cross multiply
   10,857.56x = 14,978.67 × 8,335.22
4. Step 4: Simplify right side
   10,857.56x = 124,850,509.76
5. Step 5: Solve for x
   x = 124,850,509.76/10,857.56
6. Step 6: Final answer
   x = 11,498.95