Finding the Fourth Proportional to 139,940.30, 209,850.47 and 65,052.63

Step by Step Solution

1. Step 1: Write the proportion equation
   139,940.30 : 209,850.47 = 65,052.63 : x
2. Step 2: Convert to fraction form
   139,940.30/209,850.47 = 65,052.63/x
3. Step 3: Cross multiply
   139,940.30x = 209,850.47 × 65,052.63
4. Step 4: Simplify right side
   139,940.30x = 13,651,324,980.24
5. Step 5: Solve for x
   x = 13,651,324,980.24/139,940.30
6. Step 6: Final answer
   x = 97,551.06