Finding the Fourth Proportional to 67,787.78, 101,690.18 and 20,395.49

Step by Step Solution

1. Step 1: Write the proportion equation
   67,787.78 : 101,690.18 = 20,395.49 : x
2. Step 2: Convert to fraction form
   67,787.78/101,690.18 = 20,395.49/x
3. Step 3: Cross multiply
   67,787.78x = 101,690.18 × 20,395.49
4. Step 4: Simplify right side
   67,787.78x = 2,074,020,947.31
5. Step 5: Solve for x
   x = 2,074,020,947.31/67,787.78
6. Step 6: Final answer
   x = 30,595.79