Finding the Fourth Proportional to 140,168.88, 210,128.28 and 51,401.64

Step by Step Solution

1. Step 1: Write the proportion equation
   140,168.88 : 210,128.28 = 51,401.64 : x
2. Step 2: Convert to fraction form
   140,168.88/210,128.28 = 51,401.64/x
3. Step 3: Cross multiply
   140,168.88x = 210,128.28 × 51,401.64
4. Step 4: Simplify right side
   140,168.88x = 10,800,938,202.38
5. Step 5: Solve for x
   x = 10,800,938,202.38/140,168.88
6. Step 6: Final answer
   x = 77,056.61