Finding the Fourth Proportional to 139,803.18, 192,947.42 and 82,458.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,803.18 : 192,947.42 = 82,458.72 : x
2. Step 2: Convert to fraction form
   139,803.18/192,947.42 = 82,458.72/x
3. Step 3: Cross multiply
   139,803.18x = 192,947.42 × 82,458.72
4. Step 4: Simplify right side
   139,803.18x = 15,910,196,868.21
5. Step 5: Solve for x
   x = 15,910,196,868.21/139,803.18
6. Step 6: Final answer
   x = 113,804.26