Finding the Fourth Proportional to 2,635.91, 3,945.28 and 1,942.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,635.91 : 3,945.28 = 1,942.30 : x
2. Step 2: Convert to fraction form
   2,635.91/3,945.28 = 1,942.30/x
3. Step 3: Cross multiply
   2,635.91x = 3,945.28 × 1,942.30
4. Step 4: Simplify right side
   2,635.91x = 7,662,917.34
5. Step 5: Solve for x
   x = 7,662,917.34/2,635.91
6. Step 6: Final answer
   x = 2,907.12