Finding the Fourth Proportional to 8,326.31, 12,492.73 and 3,947.45

Step by Step Solution

1. Step 1: Write the proportion equation
   8,326.31 : 12,492.73 = 3,947.45 : x
2. Step 2: Convert to fraction form
   8,326.31/12,492.73 = 3,947.45/x
3. Step 3: Cross multiply
   8,326.31x = 12,492.73 × 3,947.45
4. Step 4: Simplify right side
   8,326.31x = 49,314,369.51
5. Step 5: Solve for x
   x = 49,314,369.51/8,326.31
6. Step 6: Final answer
   x = 5,922.72