Finding the Fourth Proportional to 139,408.56, 208,995.30 and 60,463.34

Step by Step Solution

1. Step 1: Write the proportion equation
   139,408.56 : 208,995.30 = 60,463.34 : x
2. Step 2: Convert to fraction form
   139,408.56/208,995.30 = 60,463.34/x
3. Step 3: Cross multiply
   139,408.56x = 208,995.30 × 60,463.34
4. Step 4: Simplify right side
   139,408.56x = 12,636,553,882.30
5. Step 5: Solve for x
   x = 12,636,553,882.30/139,408.56
6. Step 6: Final answer
   x = 90,644.03