Finding the Fourth Proportional to 189,849, 285,216.42 and 111,018.72

Step by Step Solution

1. Step 1: Write the proportion equation
   189,849 : 285,216.42 = 111,018.72 : x
2. Step 2: Convert to fraction form
   189,849/285,216.42 = 111,018.72/x
3. Step 3: Cross multiply
   189,849x = 285,216.42 × 111,018.72
4. Step 4: Simplify right side
   189,849x = 31,664,361,871.38
5. Step 5: Solve for x
   x = 31,664,361,871.38/189,849
6. Step 6: Final answer
   x = 166,787.09