Finding the Fourth Proportional to 7,009.31, 9,672.72 and 3,822.63

Step by Step Solution

1. Step 1: Write the proportion equation
   7,009.31 : 9,672.72 = 3,822.63 : x
2. Step 2: Convert to fraction form
   7,009.31/9,672.72 = 3,822.63/x
3. Step 3: Cross multiply
   7,009.31x = 9,672.72 × 3,822.63
4. Step 4: Simplify right side
   7,009.31x = 36,975,162.18
5. Step 5: Solve for x
   x = 36,975,162.18/7,009.31
6. Step 6: Final answer
   x = 5,275.15