Finding the Fourth Proportional to 195,978.50, 270,442.50 and 115,409.42

Step by Step Solution

1. Step 1: Write the proportion equation
   195,978.50 : 270,442.50 = 115,409.42 : x
2. Step 2: Convert to fraction form
   195,978.50/270,442.50 = 115,409.42/x
3. Step 3: Cross multiply
   195,978.50x = 270,442.50 × 115,409.42
4. Step 4: Simplify right side
   195,978.50x = 31,211,612,068.35
5. Step 5: Solve for x
   x = 31,211,612,068.35/195,978.50
6. Step 6: Final answer
   x = 159,260.39