Finding the Fourth Proportional to 3,756.60, 5,633.52 and 1,290.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,756.60 : 5,633.52 = 1,290.72 : x
2. Step 2: Convert to fraction form
   3,756.60/5,633.52 = 1,290.72/x
3. Step 3: Cross multiply
   3,756.60x = 5,633.52 × 1,290.72
4. Step 4: Simplify right side
   3,756.60x = 7,271,296.93
5. Step 5: Solve for x
   x = 7,271,296.93/3,756.60
6. Step 6: Final answer
   x = 1,935.61