Finding the Fourth Proportional to 1,271.33, 1,903.65 and 978.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,271.33 : 1,903.65 = 978.14 : x
2. Step 2: Convert to fraction form
   1,271.33/1,903.65 = 978.14/x
3. Step 3: Cross multiply
   1,271.33x = 1,903.65 × 978.14
4. Step 4: Simplify right side
   1,271.33x = 1,862,026.69
5. Step 5: Solve for x
   x = 1,862,026.69/1,271.33
6. Step 6: Final answer
   x = 1,464.63