Finding the Fourth Proportional to 4,853.28, 7,280.00 and 1,390.53

Step by Step Solution

1. Step 1: Write the proportion equation
   4,853.28 : 7,280.00 = 1,390.53 : x
2. Step 2: Convert to fraction form
   4,853.28/7,280.00 = 1,390.53/x
3. Step 3: Cross multiply
   4,853.28x = 7,280.00 × 1,390.53
4. Step 4: Simplify right side
   4,853.28x = 10,123,051.45
5. Step 5: Solve for x
   x = 10,123,051.45/4,853.28
6. Step 6: Final answer
   x = 2,085.82