Finding the Fourth Proportional to 2,620.13, 3,928.76 and 1,300.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.13 : 3,928.76 = 1,300.98 : x
2. Step 2: Convert to fraction form
   2,620.13/3,928.76 = 1,300.98/x
3. Step 3: Cross multiply
   2,620.13x = 3,928.76 × 1,300.98
4. Step 4: Simplify right side
   2,620.13x = 5,111,241.44
5. Step 5: Solve for x
   x = 5,111,241.44/2,620.13
6. Step 6: Final answer
   x = 1,950.76