Finding the Fourth Proportional to 8,905.86, 12,289.50 and 4,926.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,905.86 : 12,289.50 = 4,926.78 : x
2. Step 2: Convert to fraction form
   8,905.86/12,289.50 = 4,926.78/x
3. Step 3: Cross multiply
   8,905.86x = 12,289.50 × 4,926.78
4. Step 4: Simplify right side
   8,905.86x = 60,547,662.81
5. Step 5: Solve for x
   x = 60,547,662.81/8,905.86
6. Step 6: Final answer
   x = 6,798.63