Finding the Fourth Proportional to 139,714.50, 192,438.72 and 107,387.30

Step by Step Solution

1. Step 1: Write the proportion equation
   139,714.50 : 192,438.72 = 107,387.30 : x
2. Step 2: Convert to fraction form
   139,714.50/192,438.72 = 107,387.30/x
3. Step 3: Cross multiply
   139,714.50x = 192,438.72 × 107,387.30
4. Step 4: Simplify right side
   139,714.50x = 20,665,473,594.06
5. Step 5: Solve for x
   x = 20,665,473,594.06/139,714.50
6. Step 6: Final answer
   x = 147,912.16