Finding the Fourth Proportional to 8,783.31, 13,180.16 and 3,240.55

Step by Step Solution

1. Step 1: Write the proportion equation
   8,783.31 : 13,180.16 = 3,240.55 : x
2. Step 2: Convert to fraction form
   8,783.31/13,180.16 = 3,240.55/x
3. Step 3: Cross multiply
   8,783.31x = 13,180.16 × 3,240.55
4. Step 4: Simplify right side
   8,783.31x = 42,710,967.49
5. Step 5: Solve for x
   x = 42,710,967.49/8,783.31
6. Step 6: Final answer
   x = 4,862.74