Finding the Fourth Proportional to 35,745.57, 49,331.23 and 20,638.87

Step by Step Solution

1. Step 1: Write the proportion equation
   35,745.57 : 49,331.23 = 20,638.87 : x
2. Step 2: Convert to fraction form
   35,745.57/49,331.23 = 20,638.87/x
3. Step 3: Cross multiply
   35,745.57x = 49,331.23 × 20,638.87
4. Step 4: Simplify right side
   35,745.57x = 1,018,140,667.98
5. Step 5: Solve for x
   x = 1,018,140,667.98/35,745.57
6. Step 6: Final answer
   x = 28,482.99