Finding the Fourth Proportional to 1,986.16, 2,978.52 and 946.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,986.16 : 2,978.52 = 946.12 : x
2. Step 2: Convert to fraction form
   1,986.16/2,978.52 = 946.12/x
3. Step 3: Cross multiply
   1,986.16x = 2,978.52 × 946.12
4. Step 4: Simplify right side
   1,986.16x = 2,818,037.34
5. Step 5: Solve for x
   x = 2,818,037.34/1,986.16
6. Step 6: Final answer
   x = 1,418.84