Finding the Fourth Proportional to 3,842.45, 5,761.78 and 1,245.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,842.45 : 5,761.78 = 1,245.05 : x
2. Step 2: Convert to fraction form
   3,842.45/5,761.78 = 1,245.05/x
3. Step 3: Cross multiply
   3,842.45x = 5,761.78 × 1,245.05
4. Step 4: Simplify right side
   3,842.45x = 7,173,704.19
5. Step 5: Solve for x
   x = 7,173,704.19/3,842.45
6. Step 6: Final answer
   x = 1,866.96