Finding the Fourth Proportional to 139,679.21, 192,623.31 and 93,842.42

Step by Step Solution

1. Step 1: Write the proportion equation
   139,679.21 : 192,623.31 = 93,842.42 : x
2. Step 2: Convert to fraction form
   139,679.21/192,623.31 = 93,842.42/x
3. Step 3: Cross multiply
   139,679.21x = 192,623.31 × 93,842.42
4. Step 4: Simplify right side
   139,679.21x = 18,076,236,595.69
5. Step 5: Solve for x
   x = 18,076,236,595.69/139,679.21
6. Step 6: Final answer
   x = 129,412.50