Finding the Fourth Proportional to 139,251.78, 192,072.33 and 88,928.10

Step by Step Solution

1. Step 1: Write the proportion equation
   139,251.78 : 192,072.33 = 88,928.10 : x
2. Step 2: Convert to fraction form
   139,251.78/192,072.33 = 88,928.10/x
3. Step 3: Cross multiply
   139,251.78x = 192,072.33 × 88,928.10
4. Step 4: Simplify right side
   139,251.78x = 17,080,627,369.47
5. Step 5: Solve for x
   x = 17,080,627,369.47/139,251.78
6. Step 6: Final answer
   x = 122,660.03