Finding the Fourth Proportional to 9,001.31, 12,419.82 and 5,222.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,001.31 : 12,419.82 = 5,222.28 : x
2. Step 2: Convert to fraction form
   9,001.31/12,419.82 = 5,222.28/x
3. Step 3: Cross multiply
   9,001.31x = 12,419.82 × 5,222.28
4. Step 4: Simplify right side
   9,001.31x = 64,859,804.58
5. Step 5: Solve for x
   x = 64,859,804.58/9,001.31
6. Step 6: Final answer
   x = 7,205.60