Finding the Fourth Proportional to 2,345.19, 3,516.61 and 864.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,345.19 : 3,516.61 = 864.34 : x
2. Step 2: Convert to fraction form
   2,345.19/3,516.61 = 864.34/x
3. Step 3: Cross multiply
   2,345.19x = 3,516.61 × 864.34
4. Step 4: Simplify right side
   2,345.19x = 3,039,546.69
5. Step 5: Solve for x
   x = 3,039,546.69/2,345.19
6. Step 6: Final answer
   x = 1,296.08