Finding the Fourth Proportional to 139,011.96, 208,362.42 and 60,007.80

Step by Step Solution

1. Step 1: Write the proportion equation
   139,011.96 : 208,362.42 = 60,007.80 : x
2. Step 2: Convert to fraction form
   139,011.96/208,362.42 = 60,007.80/x
3. Step 3: Cross multiply
   139,011.96x = 208,362.42 × 60,007.80
4. Step 4: Simplify right side
   139,011.96x = 12,503,370,426.88
5. Step 5: Solve for x
   x = 12,503,370,426.88/139,011.96
6. Step 6: Final answer
   x = 89,944.57