Finding the Fourth Proportional to 8,915.61, 12,303.61 and 4,936.79

Step by Step Solution

1. Step 1: Write the proportion equation
   8,915.61 : 12,303.61 = 4,936.79 : x
2. Step 2: Convert to fraction form
   8,915.61/12,303.61 = 4,936.79/x
3. Step 3: Cross multiply
   8,915.61x = 12,303.61 × 4,936.79
4. Step 4: Simplify right side
   8,915.61x = 60,740,338.81
5. Step 5: Solve for x
   x = 60,740,338.81/8,915.61
6. Step 6: Final answer
   x = 6,812.81