Finding the Fourth Proportional to 139,942.29, 209,853.47 and 65,054.63

Step by Step Solution

1. Step 1: Write the proportion equation
   139,942.29 : 209,853.47 = 65,054.63 : x
2. Step 2: Convert to fraction form
   139,942.29/209,853.47 = 65,054.63/x
3. Step 3: Cross multiply
   139,942.29x = 209,853.47 × 65,054.63
4. Step 4: Simplify right side
   139,942.29x = 13,651,938,470.53
5. Step 5: Solve for x
   x = 13,651,938,470.53/139,942.29
6. Step 6: Final answer
   x = 97,554.06