Finding the Fourth Proportional to 139,889.94, 193,042.06 and 79,460.40

Step by Step Solution

1. Step 1: Write the proportion equation
   139,889.94 : 193,042.06 = 79,460.40 : x
2. Step 2: Convert to fraction form
   139,889.94/193,042.06 = 79,460.40/x
3. Step 3: Cross multiply
   139,889.94x = 193,042.06 × 79,460.40
4. Step 4: Simplify right side
   139,889.94x = 15,339,199,304.42
5. Step 5: Solve for x
   x = 15,339,199,304.42/139,889.94
6. Step 6: Final answer
   x = 109,651.91