Finding the Fourth Proportional to 143,631.99, 215,471.34 and 42,440.31

Step by Step Solution

1. Step 1: Write the proportion equation
   143,631.99 : 215,471.34 = 42,440.31 : x
2. Step 2: Convert to fraction form
   143,631.99/215,471.34 = 42,440.31/x
3. Step 3: Cross multiply
   143,631.99x = 215,471.34 × 42,440.31
4. Step 4: Simplify right side
   143,631.99x = 9,144,670,465.72
5. Step 5: Solve for x
   x = 9,144,670,465.72/143,631.99
6. Step 6: Final answer
   x = 63,667.37