Finding the Fourth Proportional to 3,755.92, 5,631.72 and 1,290.04

Step by Step Solution

1. Step 1: Write the proportion equation
   3,755.92 : 5,631.72 = 1,290.04 : x
2. Step 2: Convert to fraction form
   3,755.92/5,631.72 = 1,290.04/x
3. Step 3: Cross multiply
   3,755.92x = 5,631.72 × 1,290.04
4. Step 4: Simplify right side
   3,755.92x = 7,265,144.07
5. Step 5: Solve for x
   x = 7,265,144.07/3,755.92
6. Step 6: Final answer
   x = 1,934.32