Finding the Fourth Proportional to 140,635.48, 210,926.34 and 42,139.48

Step by Step Solution

1. Step 1: Write the proportion equation
   140,635.48 : 210,926.34 = 42,139.48 : x
2. Step 2: Convert to fraction form
   140,635.48/210,926.34 = 42,139.48/x
3. Step 3: Cross multiply
   140,635.48x = 210,926.34 × 42,139.48
4. Step 4: Simplify right side
   140,635.48x = 8,888,326,285.90
5. Step 5: Solve for x
   x = 8,888,326,285.90/140,635.48
6. Step 6: Final answer
   x = 63,201.17