Finding the Fourth Proportional to 1,320.47, 1,983.27 and 972.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,320.47 : 1,983.27 = 972.43 : x
2. Step 2: Convert to fraction form
   1,320.47/1,983.27 = 972.43/x
3. Step 3: Cross multiply
   1,320.47x = 1,983.27 × 972.43
4. Step 4: Simplify right side
   1,320.47x = 1,928,591.25
5. Step 5: Solve for x
   x = 1,928,591.25/1,320.47
6. Step 6: Final answer
   x = 1,460.53