Finding the Fourth Proportional to 140,131.68, 210,135 and 51,323.28

Step by Step Solution

1. Step 1: Write the proportion equation
   140,131.68 : 210,135 = 51,323.28 : x
2. Step 2: Convert to fraction form
   140,131.68/210,135 = 51,323.28/x
3. Step 3: Cross multiply
   140,131.68x = 210,135 × 51,323.28
4. Step 4: Simplify right side
   140,131.68x = 10,784,817,442.80
5. Step 5: Solve for x
   x = 10,784,817,442.80/140,131.68
6. Step 6: Final answer
   x = 76,962.02