Finding the Fourth Proportional to 2,300.64, 3,450.60 and 839.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,300.64 : 3,450.60 = 839.79 : x
2. Step 2: Convert to fraction form
   2,300.64/3,450.60 = 839.79/x
3. Step 3: Cross multiply
   2,300.64x = 3,450.60 × 839.79
4. Step 4: Simplify right side
   2,300.64x = 2,897,779.37
5. Step 5: Solve for x
   x = 2,897,779.37/2,300.64
6. Step 6: Final answer
   x = 1,259.56