Finding the Fourth Proportional to 8,784.68, 12,123.15 and 5,008.40

Step by Step Solution

1. Step 1: Write the proportion equation
   8,784.68 : 12,123.15 = 5,008.40 : x
2. Step 2: Convert to fraction form
   8,784.68/12,123.15 = 5,008.40/x
3. Step 3: Cross multiply
   8,784.68x = 12,123.15 × 5,008.40
4. Step 4: Simplify right side
   8,784.68x = 60,717,523.84
5. Step 5: Solve for x
   x = 60,717,523.84/8,784.68
6. Step 6: Final answer
   x = 6,911.76