Finding the Fourth Proportional to 139,649.32, 192,781.38 and 89,377.48

Step by Step Solution

1. Step 1: Write the proportion equation
   139,649.32 : 192,781.38 = 89,377.48 : x
2. Step 2: Convert to fraction form
   139,649.32/192,781.38 = 89,377.48/x
3. Step 3: Cross multiply
   139,649.32x = 192,781.38 × 89,377.48
4. Step 4: Simplify right side
   139,649.32x = 17,230,313,935.32
5. Step 5: Solve for x
   x = 17,230,313,935.32/139,649.32
6. Step 6: Final answer
   x = 123,382.73