Finding the Fourth Proportional to 1,942.64, 2,911.94 and 846.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,942.64 : 2,911.94 = 846.72 : x
2. Step 2: Convert to fraction form
   1,942.64/2,911.94 = 846.72/x
3. Step 3: Cross multiply
   1,942.64x = 2,911.94 × 846.72
4. Step 4: Simplify right side
   1,942.64x = 2,465,597.84
5. Step 5: Solve for x
   x = 2,465,597.84/1,942.64
6. Step 6: Final answer
   x = 1,269.20