Finding the Fourth Proportional to 3,790.50, 5,688.30 and 1,325.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,790.50 : 5,688.30 = 1,325.31 : x
2. Step 2: Convert to fraction form
   3,790.50/5,688.30 = 1,325.31/x
3. Step 3: Cross multiply
   3,790.50x = 5,688.30 × 1,325.31
4. Step 4: Simplify right side
   3,790.50x = 7,538,760.87
5. Step 5: Solve for x
   x = 7,538,760.87/3,790.50
6. Step 6: Final answer
   x = 1,988.86