Finding the Fourth Proportional to 2,780.21, 4,171.34 and 1,300.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,780.21 : 4,171.34 = 1,300.27 : x
2. Step 2: Convert to fraction form
   2,780.21/4,171.34 = 1,300.27/x
3. Step 3: Cross multiply
   2,780.21x = 4,171.34 × 1,300.27
4. Step 4: Simplify right side
   2,780.21x = 5,423,868.26
5. Step 5: Solve for x
   x = 5,423,868.26/2,780.21
6. Step 6: Final answer
   x = 1,950.88