Finding the Fourth Proportional to 139,213.72, 192,027.54 and 82,585

Step by Step Solution

1. Step 1: Write the proportion equation
   139,213.72 : 192,027.54 = 82,585 : x
2. Step 2: Convert to fraction form
   139,213.72/192,027.54 = 82,585/x
3. Step 3: Cross multiply
   139,213.72x = 192,027.54 × 82,585
4. Step 4: Simplify right side
   139,213.72x = 15,858,594,390.90
5. Step 5: Solve for x
   x = 15,858,594,390.90/139,213.72
6. Step 6: Final answer
   x = 113,915.46