Finding the Fourth Proportional to 139,518.05, 209,272.41 and 60,632.28

Step by Step Solution

1. Step 1: Write the proportion equation
   139,518.05 : 209,272.41 = 60,632.28 : x
2. Step 2: Convert to fraction form
   139,518.05/209,272.41 = 60,632.28/x
3. Step 3: Cross multiply
   139,518.05x = 209,272.41 × 60,632.28
4. Step 4: Simplify right side
   139,518.05x = 12,688,663,359.39
5. Step 5: Solve for x
   x = 12,688,663,359.39/139,518.05
6. Step 6: Final answer
   x = 90,946.40