Finding the Fourth Proportional to 139,719.33, 192,385.68 and 105,314.04

Step by Step Solution

1. Step 1: Write the proportion equation
   139,719.33 : 192,385.68 = 105,314.04 : x
2. Step 2: Convert to fraction form
   139,719.33/192,385.68 = 105,314.04/x
3. Step 3: Cross multiply
   139,719.33x = 192,385.68 × 105,314.04
4. Step 4: Simplify right side
   139,719.33x = 20,260,913,198.95
5. Step 5: Solve for x
   x = 20,260,913,198.95/139,719.33
6. Step 6: Final answer
   x = 145,011.53