Finding the Fourth Proportional to 139,847.96, 193,004.10 and 85,397.12

Step by Step Solution

1. Step 1: Write the proportion equation
   139,847.96 : 193,004.10 = 85,397.12 : x
2. Step 2: Convert to fraction form
   139,847.96/193,004.10 = 85,397.12/x
3. Step 3: Cross multiply
   139,847.96x = 193,004.10 × 85,397.12
4. Step 4: Simplify right side
   139,847.96x = 16,481,993,323.17
5. Step 5: Solve for x
   x = 16,481,993,323.17/139,847.96
6. Step 6: Final answer
   x = 117,856.52