Finding the Fourth Proportional to 139,916.82, 193,085.87 and 79,490.78

Step by Step Solution

1. Step 1: Write the proportion equation
   139,916.82 : 193,085.87 = 79,490.78 : x
2. Step 2: Convert to fraction form
   139,916.82/193,085.87 = 79,490.78/x
3. Step 3: Cross multiply
   139,916.82x = 193,085.87 × 79,490.78
4. Step 4: Simplify right side
   139,916.82x = 15,348,546,413.28
5. Step 5: Solve for x
   x = 15,348,546,413.28/139,916.82
6. Step 6: Final answer
   x = 109,697.65