Finding the Fourth Proportional to 139,433.71, 209,033.02 and 60,488.41

Step by Step Solution

1. Step 1: Write the proportion equation
   139,433.71 : 209,033.02 = 60,488.41 : x
2. Step 2: Convert to fraction form
   139,433.71/209,033.02 = 60,488.41/x
3. Step 3: Cross multiply
   139,433.71x = 209,033.02 × 60,488.41
4. Step 4: Simplify right side
   139,433.71x = 12,644,073,669.69
5. Step 5: Solve for x
   x = 12,644,073,669.69/139,433.71
6. Step 6: Final answer
   x = 90,681.62