Finding the Fourth Proportional to 30,877.24, 42,612.72 and 18,782.45

Step by Step Solution

1. Step 1: Write the proportion equation
   30,877.24 : 42,612.72 = 18,782.45 : x
2. Step 2: Convert to fraction form
   30,877.24/42,612.72 = 18,782.45/x
3. Step 3: Cross multiply
   30,877.24x = 42,612.72 × 18,782.45
4. Step 4: Simplify right side
   30,877.24x = 800,371,282.76
5. Step 5: Solve for x
   x = 800,371,282.76/30,877.24
6. Step 6: Final answer
   x = 25,921.08