Finding the Fourth Proportional to 1,488.81, 2,052.17 and 1,173.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.81 : 2,052.17 = 1,173.56 : x
2. Step 2: Convert to fraction form
   1,488.81/2,052.17 = 1,173.56/x
3. Step 3: Cross multiply
   1,488.81x = 2,052.17 × 1,173.56
4. Step 4: Simplify right side
   1,488.81x = 2,408,339.50
5. Step 5: Solve for x
   x = 2,408,339.50/1,488.81
6. Step 6: Final answer
   x = 1,617.62