Finding the Fourth Proportional to 139,443, 209,923.22 and 127,042.71

Step by Step Solution

1. Step 1: Write the proportion equation
   139,443 : 209,923.22 = 127,042.71 : x
2. Step 2: Convert to fraction form
   139,443/209,923.22 = 127,042.71/x
3. Step 3: Cross multiply
   139,443x = 209,923.22 × 127,042.71
4. Step 4: Simplify right side
   139,443x = 26,669,214,125.51
5. Step 5: Solve for x
   x = 26,669,214,125.51/139,443
6. Step 6: Final answer
   x = 191,255.31