Finding the Fourth Proportional to 2,142.59, 3,214.79 and 972.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.59 : 3,214.79 = 972.54 : x
2. Step 2: Convert to fraction form
   2,142.59/3,214.79 = 972.54/x
3. Step 3: Cross multiply
   2,142.59x = 3,214.79 × 972.54
4. Step 4: Simplify right side
   2,142.59x = 3,126,510.65
5. Step 5: Solve for x
   x = 3,126,510.65/2,142.59
6. Step 6: Final answer
   x = 1,459.22