Finding the Fourth Proportional to 139,879.51, 209,705.05 and 65,046.45

Step by Step Solution

1. Step 1: Write the proportion equation
   139,879.51 : 209,705.05 = 65,046.45 : x
2. Step 2: Convert to fraction form
   139,879.51/209,705.05 = 65,046.45/x
3. Step 3: Cross multiply
   139,879.51x = 209,705.05 × 65,046.45
4. Step 4: Simplify right side
   139,879.51x = 13,640,569,049.57
5. Step 5: Solve for x
   x = 13,640,569,049.57/139,879.51
6. Step 6: Final answer
   x = 97,516.56