Finding the Fourth Proportional to 108,478.17, 149,705.42 and 60,728.67

Step by Step Solution

1. Step 1: Write the proportion equation
   108,478.17 : 149,705.42 = 60,728.67 : x
2. Step 2: Convert to fraction form
   108,478.17/149,705.42 = 60,728.67/x
3. Step 3: Cross multiply
   108,478.17x = 149,705.42 × 60,728.67
4. Step 4: Simplify right side
   108,478.17x = 9,091,410,744.75
5. Step 5: Solve for x
   x = 9,091,410,744.75/108,478.17
6. Step 6: Final answer
   x = 83,808.67