Finding the Fourth Proportional to 8,784.64, 13,114.31 and 8,477.08

Step by Step Solution

1. Step 1: Write the proportion equation
   8,784.64 : 13,114.31 = 8,477.08 : x
2. Step 2: Convert to fraction form
   8,784.64/13,114.31 = 8,477.08/x
3. Step 3: Cross multiply
   8,784.64x = 13,114.31 × 8,477.08
4. Step 4: Simplify right side
   8,784.64x = 111,171,055.01
5. Step 5: Solve for x
   x = 111,171,055.01/8,784.64
6. Step 6: Final answer
   x = 12,655.16