Finding the Fourth Proportional to 57,787.82, 86,677.41 and 20,851.82

Step by Step Solution

1. Step 1: Write the proportion equation
   57,787.82 : 86,677.41 = 20,851.82 : x
2. Step 2: Convert to fraction form
   57,787.82/86,677.41 = 20,851.82/x
3. Step 3: Cross multiply
   57,787.82x = 86,677.41 × 20,851.82
4. Step 4: Simplify right side
   57,787.82x = 1,807,381,751.39
5. Step 5: Solve for x
   x = 1,807,381,751.39/57,787.82
6. Step 6: Final answer
   x = 31,276.17