Finding the Fourth Proportional to 142,019.91, 212,993.01 and 42,156.63

Step by Step Solution

1. Step 1: Write the proportion equation
   142,019.91 : 212,993.01 = 42,156.63 : x
2. Step 2: Convert to fraction form
   142,019.91/212,993.01 = 42,156.63/x
3. Step 3: Cross multiply
   142,019.91x = 212,993.01 × 42,156.63
4. Step 4: Simplify right side
   142,019.91x = 8,979,067,515.16
5. Step 5: Solve for x
   x = 8,979,067,515.16/142,019.91
6. Step 6: Final answer
   x = 63,224.01