Finding the Fourth Proportional to 139,971.52, 209,957.16 and 34,790.48

Step by Step Solution

1. Step 1: Write the proportion equation
   139,971.52 : 209,957.16 = 34,790.48 : x
2. Step 2: Convert to fraction form
   139,971.52/209,957.16 = 34,790.48/x
3. Step 3: Cross multiply
   139,971.52x = 209,957.16 × 34,790.48
4. Step 4: Simplify right side
   139,971.52x = 7,304,510,375.84
5. Step 5: Solve for x
   x = 7,304,510,375.84/139,971.52
6. Step 6: Final answer
   x = 52,185.69