Finding the Fourth Proportional to 8,602.20, 11,870.55 and 5,066.55

Step by Step Solution

1. Step 1: Write the proportion equation
   8,602.20 : 11,870.55 = 5,066.55 : x
2. Step 2: Convert to fraction form
   8,602.20/11,870.55 = 5,066.55/x
3. Step 3: Cross multiply
   8,602.20x = 11,870.55 × 5,066.55
4. Step 4: Simplify right side
   8,602.20x = 60,142,735.10
5. Step 5: Solve for x
   x = 60,142,735.10/8,602.20
6. Step 6: Final answer
   x = 6,991.55