Finding the Fourth Proportional to 2,778.76, 4,166.52 and 1,317.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,778.76 : 4,166.52 = 1,317.52 : x
2. Step 2: Convert to fraction form
   2,778.76/4,166.52 = 1,317.52/x
3. Step 3: Cross multiply
   2,778.76x = 4,166.52 × 1,317.52
4. Step 4: Simplify right side
   2,778.76x = 5,489,473.43
5. Step 5: Solve for x
   x = 5,489,473.43/2,778.76
6. Step 6: Final answer
   x = 1,975.51