Finding the Fourth Proportional to 140,643.48, 210,938.34 and 42,147.48

Step by Step Solution

1. Step 1: Write the proportion equation
   140,643.48 : 210,938.34 = 42,147.48 : x
2. Step 2: Convert to fraction form
   140,643.48/210,938.34 = 42,147.48/x
3. Step 3: Cross multiply
   140,643.48x = 210,938.34 × 42,147.48
4. Step 4: Simplify right side
   140,643.48x = 8,890,519,466.38
5. Step 5: Solve for x
   x = 8,890,519,466.38/140,643.48
6. Step 6: Final answer
   x = 63,213.16