Finding the Fourth Proportional to 2,931.51, 4,394.60 and 1,081.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,931.51 : 4,394.60 = 1,081.34 : x
2. Step 2: Convert to fraction form
   2,931.51/4,394.60 = 1,081.34/x
3. Step 3: Cross multiply
   2,931.51x = 4,394.60 × 1,081.34
4. Step 4: Simplify right side
   2,931.51x = 4,752,056.76
5. Step 5: Solve for x
   x = 4,752,056.76/2,931.51
6. Step 6: Final answer
   x = 1,621.03