Finding the Fourth Proportional to 2,851.64, 4,277.58 and 978.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,851.64 : 4,277.58 = 978.82 : x
2. Step 2: Convert to fraction form
   2,851.64/4,277.58 = 978.82/x
3. Step 3: Cross multiply
   2,851.64x = 4,277.58 × 978.82
4. Step 4: Simplify right side
   2,851.64x = 4,186,980.86
5. Step 5: Solve for x
   x = 4,186,980.86/2,851.64
6. Step 6: Final answer
   x = 1,468.27