Finding the Fourth Proportional to 140,418.37, 210,710.78 and 51,734.10

Step by Step Solution

1. Step 1: Write the proportion equation
   140,418.37 : 210,710.78 = 51,734.10 : x
2. Step 2: Convert to fraction form
   140,418.37/210,710.78 = 51,734.10/x
3. Step 3: Cross multiply
   140,418.37x = 210,710.78 × 51,734.10
4. Step 4: Simplify right side
   140,418.37x = 10,900,932,563.60
5. Step 5: Solve for x
   x = 10,900,932,563.60/140,418.37
6. Step 6: Final answer
   x = 77,631.81