Finding the Fourth Proportional to 50,826.78, 70,144.65 and 30,688.56

Step by Step Solution

1. Step 1: Write the proportion equation
   50,826.78 : 70,144.65 = 30,688.56 : x
2. Step 2: Convert to fraction form
   50,826.78/70,144.65 = 30,688.56/x
3. Step 3: Cross multiply
   50,826.78x = 70,144.65 × 30,688.56
4. Step 4: Simplify right side
   50,826.78x = 2,152,638,300.20
5. Step 5: Solve for x
   x = 2,152,638,300.20/50,826.78
6. Step 6: Final answer
   x = 42,352.44