Finding the Fourth Proportional to 139,408.52, 208,995.20 and 60,463.29

Step by Step Solution

1. Step 1: Write the proportion equation
   139,408.52 : 208,995.20 = 60,463.29 : x
2. Step 2: Convert to fraction form
   139,408.52/208,995.20 = 60,463.29/x
3. Step 3: Cross multiply
   139,408.52x = 208,995.20 × 60,463.29
4. Step 4: Simplify right side
   139,408.52x = 12,636,537,386.21
5. Step 5: Solve for x
   x = 12,636,537,386.21/139,408.52
6. Step 6: Final answer
   x = 90,643.94