Finding the Fourth Proportional to 64,300.82, 88,778.46 and 40,138.57

Step by Step Solution

1. Step 1: Write the proportion equation
   64,300.82 : 88,778.46 = 40,138.57 : x
2. Step 2: Convert to fraction form
   64,300.82/88,778.46 = 40,138.57/x
3. Step 3: Cross multiply
   64,300.82x = 88,778.46 × 40,138.57
4. Step 4: Simplify right side
   64,300.82x = 3,563,440,692.69
5. Step 5: Solve for x
   x = 3,563,440,692.69/64,300.82
6. Step 6: Final answer
   x = 55,418.28