Finding the Fourth Proportional to 139,369.14, 209,061.63 and 39,521.43

Step by Step Solution

1. Step 1: Write the proportion equation
   139,369.14 : 209,061.63 = 39,521.43 : x
2. Step 2: Convert to fraction form
   139,369.14/209,061.63 = 39,521.43/x
3. Step 3: Cross multiply
   139,369.14x = 209,061.63 × 39,521.43
4. Step 4: Simplify right side
   139,369.14x = 8,262,414,575.73
5. Step 5: Solve for x
   x = 8,262,414,575.73/139,369.14
6. Step 6: Final answer
   x = 59,284.39