Finding the Fourth Proportional to 8,978.55, 13,471.06 and 3,136.02

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978.55 : 13,471.06 = 3,136.02 : x
2. Step 2: Convert to fraction form
   8,978.55/13,471.06 = 3,136.02/x
3. Step 3: Cross multiply
   8,978.55x = 13,471.06 × 3,136.02
4. Step 4: Simplify right side
   8,978.55x = 42,245,513.58
5. Step 5: Solve for x
   x = 42,245,513.58/8,978.55
6. Step 6: Final answer
   x = 4,705.16