Finding the Fourth Proportional to 139,847.39, 193,003.33 and 85,396.55

Step by Step Solution

1. Step 1: Write the proportion equation
   139,847.39 : 193,003.33 = 85,396.55 : x
2. Step 2: Convert to fraction form
   139,847.39/193,003.33 = 85,396.55/x
3. Step 3: Cross multiply
   139,847.39x = 193,003.33 × 85,396.55
4. Step 4: Simplify right side
   139,847.39x = 16,481,818,520.51
5. Step 5: Solve for x
   x = 16,481,818,520.51/139,847.39
6. Step 6: Final answer
   x = 117,855.75