Finding the Fourth Proportional to 185,760.48, 278,640.69 and 45,517.89

Step by Step Solution

1. Step 1: Write the proportion equation
   185,760.48 : 278,640.69 = 45,517.89 : x
2. Step 2: Convert to fraction form
   185,760.48/278,640.69 = 45,517.89/x
3. Step 3: Cross multiply
   185,760.48x = 278,640.69 × 45,517.89
4. Step 4: Simplify right side
   185,760.48x = 12,683,136,276.94
5. Step 5: Solve for x
   x = 12,683,136,276.94/185,760.48
6. Step 6: Final answer
   x = 68,276.83