Finding the Fourth Proportional to 140,638.04, 210,930.18 and 42,142.04

Step by Step Solution

1. Step 1: Write the proportion equation
   140,638.04 : 210,930.18 = 42,142.04 : x
2. Step 2: Convert to fraction form
   140,638.04/210,930.18 = 42,142.04/x
3. Step 3: Cross multiply
   140,638.04x = 210,930.18 × 42,142.04
4. Step 4: Simplify right side
   140,638.04x = 8,889,028,715.45
5. Step 5: Solve for x
   x = 8,889,028,715.45/140,638.04
6. Step 6: Final answer
   x = 63,205.01