Finding the Fourth Proportional to 6,145.10, 9,217.52 and 1,985.42

Step by Step Solution

1. Step 1: Write the proportion equation
   6,145.10 : 9,217.52 = 1,985.42 : x
2. Step 2: Convert to fraction form
   6,145.10/9,217.52 = 1,985.42/x
3. Step 3: Cross multiply
   6,145.10x = 9,217.52 × 1,985.42
4. Step 4: Simplify right side
   6,145.10x = 18,300,648.56
5. Step 5: Solve for x
   x = 18,300,648.56/6,145.10
6. Step 6: Final answer
   x = 2,978.09