Finding the Fourth Proportional to 1,650.91, 2,277.48 and 978.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,650.91 : 2,277.48 = 978.25 : x
2. Step 2: Convert to fraction form
   1,650.91/2,277.48 = 978.25/x
3. Step 3: Cross multiply
   1,650.91x = 2,277.48 × 978.25
4. Step 4: Simplify right side
   1,650.91x = 2,227,944.81
5. Step 5: Solve for x
   x = 2,227,944.81/1,650.91
6. Step 6: Final answer
   x = 1,349.53