Finding the Fourth Proportional to 48,665.79, 67,152.78 and 28,518.05

Step by Step Solution

1. Step 1: Write the proportion equation
   48,665.79 : 67,152.78 = 28,518.05 : x
2. Step 2: Convert to fraction form
   48,665.79/67,152.78 = 28,518.05/x
3. Step 3: Cross multiply
   48,665.79x = 67,152.78 × 28,518.05
4. Step 4: Simplify right side
   48,665.79x = 1,915,066,505.56
5. Step 5: Solve for x
   x = 1,915,066,505.56/48,665.79
6. Step 6: Final answer
   x = 39,351.39