Finding the Fourth Proportional to 139,516.55, 209,270.16 and 60,630.78

Step by Step Solution

1. Step 1: Write the proportion equation
   139,516.55 : 209,270.16 = 60,630.78 : x
2. Step 2: Convert to fraction form
   139,516.55/209,270.16 = 60,630.78/x
3. Step 3: Cross multiply
   139,516.55x = 209,270.16 × 60,630.78
4. Step 4: Simplify right side
   139,516.55x = 12,688,212,468.62
5. Step 5: Solve for x
   x = 12,688,212,468.62/139,516.55
6. Step 6: Final answer
   x = 90,944.14