Finding the Fourth Proportional to 140,638, 210,991.56 and 42,142

Step by Step Solution

1. Step 1: Write the proportion equation
   140,638 : 210,991.56 = 42,142 : x
2. Step 2: Convert to fraction form
   140,638/210,991.56 = 42,142/x
3. Step 3: Cross multiply
   140,638x = 210,991.56 × 42,142
4. Step 4: Simplify right side
   140,638x = 8,891,606,321.52
5. Step 5: Solve for x
   x = 8,891,606,321.52/140,638
6. Step 6: Final answer
   x = 63,223.36