Finding the Fourth Proportional to 4,978.74, 7,469.28 and 2,788.98

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.74 : 7,469.28 = 2,788.98 : x
2. Step 2: Convert to fraction form
   4,978.74/7,469.28 = 2,788.98/x
3. Step 3: Cross multiply
   4,978.74x = 7,469.28 × 2,788.98
4. Step 4: Simplify right side
   4,978.74x = 20,831,672.53
5. Step 5: Solve for x
   x = 20,831,672.53/4,978.74
6. Step 6: Final answer
   x = 4,184.13