Finding the Fourth Proportional to 143,630.99, 215,469.84 and 42,439.31

Step by Step Solution

1. Step 1: Write the proportion equation
   143,630.99 : 215,469.84 = 42,439.31 : x
2. Step 2: Convert to fraction form
   143,630.99/215,469.84 = 42,439.31/x
3. Step 3: Cross multiply
   143,630.99x = 215,469.84 × 42,439.31
4. Step 4: Simplify right side
   143,630.99x = 9,144,390,258.06
5. Step 5: Solve for x
   x = 9,144,390,258.06/143,630.99
6. Step 6: Final answer
   x = 63,665.86