Finding the Fourth Proportional to 140,642.48, 210,936.84 and 42,146.48

Step by Step Solution

1. Step 1: Write the proportion equation
   140,642.48 : 210,936.84 = 42,146.48 : x
2. Step 2: Convert to fraction form
   140,642.48/210,936.84 = 42,146.48/x
3. Step 3: Cross multiply
   140,642.48x = 210,936.84 × 42,146.48
4. Step 4: Simplify right side
   140,642.48x = 8,890,245,308.32
5. Step 5: Solve for x
   x = 8,890,245,308.32/140,642.48
6. Step 6: Final answer
   x = 63,211.66