Finding the Fourth Proportional to 139,414.74, 209,004.54 and 60,469.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,414.74 : 209,004.54 = 60,469.50 : x
2. Step 2: Convert to fraction form
   139,414.74/209,004.54 = 60,469.50/x
3. Step 3: Cross multiply
   139,414.74x = 209,004.54 × 60,469.50
4. Step 4: Simplify right side
   139,414.74x = 12,638,400,031.53
5. Step 5: Solve for x
   x = 12,638,400,031.53/139,414.74
6. Step 6: Final answer
   x = 90,653.26