Finding the Fourth Proportional to 8,825.31, 13,228.79 and 2,978.73

Step by Step Solution

1. Step 1: Write the proportion equation
   8,825.31 : 13,228.79 = 2,978.73 : x
2. Step 2: Convert to fraction form
   8,825.31/13,228.79 = 2,978.73/x
3. Step 3: Cross multiply
   8,825.31x = 13,228.79 × 2,978.73
4. Step 4: Simplify right side
   8,825.31x = 39,404,978.74
5. Step 5: Solve for x
   x = 39,404,978.74/8,825.31
6. Step 6: Final answer
   x = 4,465.00