Finding the Fourth Proportional to 8,756.55, 13,136.72 and 3,209.94

Step by Step Solution

1. Step 1: Write the proportion equation
   8,756.55 : 13,136.72 = 3,209.94 : x
2. Step 2: Convert to fraction form
   8,756.55/13,136.72 = 3,209.94/x
3. Step 3: Cross multiply
   8,756.55x = 13,136.72 × 3,209.94
4. Step 4: Simplify right side
   8,756.55x = 42,168,066.95
5. Step 5: Solve for x
   x = 42,168,066.95/8,756.55
6. Step 6: Final answer
   x = 4,815.60