Finding the Fourth Proportional to 139,356.53, 209,034.72 and 39,517.58

Step by Step Solution

1. Step 1: Write the proportion equation
   139,356.53 : 209,034.72 = 39,517.58 : x
2. Step 2: Convert to fraction form
   139,356.53/209,034.72 = 39,517.58/x
3. Step 3: Cross multiply
   139,356.53x = 209,034.72 × 39,517.58
4. Step 4: Simplify right side
   139,356.53x = 8,260,546,270.38
5. Step 5: Solve for x
   x = 8,260,546,270.38/139,356.53
6. Step 6: Final answer
   x = 59,276.35