Finding the Fourth Proportional to 31,364.80, 43,281.83 and 18,618.53

Step by Step Solution

1. Step 1: Write the proportion equation
   31,364.80 : 43,281.83 = 18,618.53 : x
2. Step 2: Convert to fraction form
   31,364.80/43,281.83 = 18,618.53/x
3. Step 3: Cross multiply
   31,364.80x = 43,281.83 × 18,618.53
4. Step 4: Simplify right side
   31,364.80x = 805,843,880.45
5. Step 5: Solve for x
   x = 805,843,880.45/31,364.80
6. Step 6: Final answer
   x = 25,692.62