Finding the Fourth Proportional to 139,852.78, 192,982.33 and 78,589.24

Step by Step Solution

1. Step 1: Write the proportion equation
   139,852.78 : 192,982.33 = 78,589.24 : x
2. Step 2: Convert to fraction form
   139,852.78/192,982.33 = 78,589.24/x
3. Step 3: Cross multiply
   139,852.78x = 192,982.33 × 78,589.24
4. Step 4: Simplify right side
   139,852.78x = 15,166,334,263.91
5. Step 5: Solve for x
   x = 15,166,334,263.91/139,852.78
6. Step 6: Final answer
   x = 108,445.00