Finding the Fourth Proportional to 3,818.65, 5,262.60 and 2,978.03

Step by Step Solution

1. Step 1: Write the proportion equation
   3,818.65 : 5,262.60 = 2,978.03 : x
2. Step 2: Convert to fraction form
   3,818.65/5,262.60 = 2,978.03/x
3. Step 3: Cross multiply
   3,818.65x = 5,262.60 × 2,978.03
4. Step 4: Simplify right side
   3,818.65x = 15,672,165.53
5. Step 5: Solve for x
   x = 15,672,165.53/3,818.65
6. Step 6: Final answer
   x = 4,104.11