Finding the Fourth Proportional to 139,508.82, 192,588.30 and 89,236.98

Step by Step Solution

1. Step 1: Write the proportion equation
   139,508.82 : 192,588.30 = 89,236.98 : x
2. Step 2: Convert to fraction form
   139,508.82/192,588.30 = 89,236.98/x
3. Step 3: Cross multiply
   139,508.82x = 192,588.30 × 89,236.98
4. Step 4: Simplify right side
   139,508.82x = 17,185,998,275.33
5. Step 5: Solve for x
   x = 17,185,998,275.33/139,508.82
6. Step 6: Final answer
   x = 123,189.33