Finding the Fourth Proportional to 9,921.22, 14,875.18 and 5,236.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,921.22 : 14,875.18 = 5,236.31 : x
2. Step 2: Convert to fraction form
   9,921.22/14,875.18 = 5,236.31/x
3. Step 3: Cross multiply
   9,921.22x = 14,875.18 × 5,236.31
4. Step 4: Simplify right side
   9,921.22x = 77,891,077.88
5. Step 5: Solve for x
   x = 77,891,077.88/9,921.22
6. Step 6: Final answer
   x = 7,850.96