Finding the Fourth Proportional to 2,620.12, 3,928.86 and 1,159.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.12 : 3,928.86 = 1,159.72 : x
2. Step 2: Convert to fraction form
   2,620.12/3,928.86 = 1,159.72/x
3. Step 3: Cross multiply
   2,620.12x = 3,928.86 × 1,159.72
4. Step 4: Simplify right side
   2,620.12x = 4,556,377.52
5. Step 5: Solve for x
   x = 4,556,377.52/2,620.12
6. Step 6: Final answer
   x = 1,739.00