Finding the Fourth Proportional to 57,826.74, 86,730.42 and 20,377.98

Step by Step Solution

1. Step 1: Write the proportion equation
   57,826.74 : 86,730.42 = 20,377.98 : x
2. Step 2: Convert to fraction form
   57,826.74/86,730.42 = 20,377.98/x
3. Step 3: Cross multiply
   57,826.74x = 86,730.42 × 20,377.98
4. Step 4: Simplify right side
   57,826.74x = 1,767,390,764.15
5. Step 5: Solve for x
   x = 1,767,390,764.15/57,826.74
6. Step 6: Final answer
   x = 30,563.56