Finding the Fourth Proportional to 140,164.56, 210,274.50 and 51,418.80

Step by Step Solution

1. Step 1: Write the proportion equation
   140,164.56 : 210,274.50 = 51,418.80 : x
2. Step 2: Convert to fraction form
   140,164.56/210,274.50 = 51,418.80/x
3. Step 3: Cross multiply
   140,164.56x = 210,274.50 × 51,418.80
4. Step 4: Simplify right side
   140,164.56x = 10,812,062,460.60
5. Step 5: Solve for x
   x = 10,812,062,460.60/140,164.56
6. Step 6: Final answer
   x = 77,138.35