Finding the Fourth Proportional to 1,986.47, 2,975.73 and 947.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,986.47 : 2,975.73 = 947.48 : x
2. Step 2: Convert to fraction form
   1,986.47/2,975.73 = 947.48/x
3. Step 3: Cross multiply
   1,986.47x = 2,975.73 × 947.48
4. Step 4: Simplify right side
   1,986.47x = 2,819,429.78
5. Step 5: Solve for x
   x = 2,819,429.78/1,986.47
6. Step 6: Final answer
   x = 1,419.32