Finding the Fourth Proportional to 247,095.69, 340,978.82 and 139,659.31

Step by Step Solution

1. Step 1: Write the proportion equation
   247,095.69 : 340,978.82 = 139,659.31 : x
2. Step 2: Convert to fraction form
   247,095.69/340,978.82 = 139,659.31/x
3. Step 3: Cross multiply
   247,095.69x = 340,978.82 × 139,659.31
4. Step 4: Simplify right side
   247,095.69x = 47,620,867,412.74
5. Step 5: Solve for x
   x = 47,620,867,412.74/247,095.69
6. Step 6: Final answer
   x = 192,722.37