Finding the Fourth Proportional to 105,915.67, 146,099.43 and 62,866.78

Step by Step Solution

1. Step 1: Write the proportion equation
   105,915.67 : 146,099.43 = 62,866.78 : x
2. Step 2: Convert to fraction form
   105,915.67/146,099.43 = 62,866.78/x
3. Step 3: Cross multiply
   105,915.67x = 146,099.43 × 62,866.78
4. Step 4: Simplify right side
   105,915.67x = 9,184,800,358.69
5. Step 5: Solve for x
   x = 9,184,800,358.69/105,915.67
6. Step 6: Final answer
   x = 86,718.05