Finding the Fourth Proportional to 4,056.79, 6,085.18 and 978.79

Step by Step Solution

1. Step 1: Write the proportion equation
   4,056.79 : 6,085.18 = 978.79 : x
2. Step 2: Convert to fraction form
   4,056.79/6,085.18 = 978.79/x
3. Step 3: Cross multiply
   4,056.79x = 6,085.18 × 978.79
4. Step 4: Simplify right side
   4,056.79x = 5,956,113.33
5. Step 5: Solve for x
   x = 5,956,113.33/4,056.79
6. Step 6: Final answer
   x = 1,468.18