Finding the Fourth Proportional to 140,478.76, 210,762.56 and 50,459.79

Step by Step Solution

1. Step 1: Write the proportion equation
   140,478.76 : 210,762.56 = 50,459.79 : x
2. Step 2: Convert to fraction form
   140,478.76/210,762.56 = 50,459.79/x
3. Step 3: Cross multiply
   140,478.76x = 210,762.56 × 50,459.79
4. Step 4: Simplify right side
   140,478.76x = 10,635,033,371.83
5. Step 5: Solve for x
   x = 10,635,033,371.83/140,478.76
6. Step 6: Final answer
   x = 75,705.63