Finding the Fourth Proportional to 139,746.78, 192,851.46 and 76,085.28

Step by Step Solution

1. Step 1: Write the proportion equation
   139,746.78 : 192,851.46 = 76,085.28 : x
2. Step 2: Convert to fraction form
   139,746.78/192,851.46 = 76,085.28/x
3. Step 3: Cross multiply
   139,746.78x = 192,851.46 × 76,085.28
4. Step 4: Simplify right side
   139,746.78x = 14,673,157,332.51
5. Step 5: Solve for x
   x = 14,673,157,332.51/139,746.78
6. Step 6: Final answer
   x = 104,998.18