Finding the Fourth Proportional to 2,777.53, 4,165.38 and 928.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,777.53 : 4,165.38 = 928.10 : x
2. Step 2: Convert to fraction form
   2,777.53/4,165.38 = 928.10/x
3. Step 3: Cross multiply
   2,777.53x = 4,165.38 × 928.10
4. Step 4: Simplify right side
   2,777.53x = 3,865,868.35
5. Step 5: Solve for x
   x = 3,865,868.35/2,777.53
6. Step 6: Final answer
   x = 1,391.84