Finding the Fourth Proportional to 139,507.82, 192,586.92 and 89,235.98

Step by Step Solution

1. Step 1: Write the proportion equation
   139,507.82 : 192,586.92 = 89,235.98 : x
2. Step 2: Convert to fraction form
   139,507.82/192,586.92 = 89,235.98/x
3. Step 3: Cross multiply
   139,507.82x = 192,586.92 × 89,235.98
4. Step 4: Simplify right side
   139,507.82x = 17,185,682,541.38
5. Step 5: Solve for x
   x = 17,185,682,541.38/139,507.82
6. Step 6: Final answer
   x = 123,187.95