Finding the Fourth Proportional to 140,145.69, 210,093.50 and 51,378.46

Step by Step Solution

1. Step 1: Write the proportion equation
   140,145.69 : 210,093.50 = 51,378.46 : x
2. Step 2: Convert to fraction form
   140,145.69/210,093.50 = 51,378.46/x
3. Step 3: Cross multiply
   140,145.69x = 210,093.50 × 51,378.46
4. Step 4: Simplify right side
   140,145.69x = 10,794,280,229.12
5. Step 5: Solve for x
   x = 10,794,280,229.12/140,145.69
6. Step 6: Final answer
   x = 77,021.85