Finding the Fourth Proportional to 12,635.10, 18,955.08 and 3,870.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,635.10 : 18,955.08 = 3,870.09 : x
2. Step 2: Convert to fraction form
   12,635.10/18,955.08 = 3,870.09/x
3. Step 3: Cross multiply
   12,635.10x = 18,955.08 × 3,870.09
4. Step 4: Simplify right side
   12,635.10x = 73,357,865.56
5. Step 5: Solve for x
   x = 73,357,865.56/12,635.10
6. Step 6: Final answer
   x = 5,805.88