Finding the Fourth Proportional to 8,745, 12,066.72 and 5,208.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,745 : 12,066.72 = 5,208.12 : x
2. Step 2: Convert to fraction form
   8,745/12,066.72 = 5,208.12/x
3. Step 3: Cross multiply
   8,745x = 12,066.72 × 5,208.12
4. Step 4: Simplify right side
   8,745x = 62,844,925.77
5. Step 5: Solve for x
   x = 62,844,925.77/8,745
6. Step 6: Final answer
   x = 7,186.38