Finding the Fourth Proportional to 140,142.43, 210,088.62 and 51,375.20

Step by Step Solution

1. Step 1: Write the proportion equation
   140,142.43 : 210,088.62 = 51,375.20 : x
2. Step 2: Convert to fraction form
   140,142.43/210,088.62 = 51,375.20/x
3. Step 3: Cross multiply
   140,142.43x = 210,088.62 × 51,375.20
4. Step 4: Simplify right side
   140,142.43x = 10,793,345,395.45
5. Step 5: Solve for x
   x = 10,793,345,395.45/140,142.43
6. Step 6: Final answer
   x = 77,016.97