Finding the Fourth Proportional to 2,527.64, 3,793.62 and 989.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,527.64 : 3,793.62 = 989.72 : x
2. Step 2: Convert to fraction form
   2,527.64/3,793.62 = 989.72/x
3. Step 3: Cross multiply
   2,527.64x = 3,793.62 × 989.72
4. Step 4: Simplify right side
   2,527.64x = 3,754,621.59
5. Step 5: Solve for x
   x = 3,754,621.59/2,527.64
6. Step 6: Final answer
   x = 1,485.43