Finding the Fourth Proportional to 2,931.81, 4,394.61 and 1,056.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,931.81 : 4,394.61 = 1,056.45 : x
2. Step 2: Convert to fraction form
   2,931.81/4,394.61 = 1,056.45/x
3. Step 3: Cross multiply
   2,931.81x = 4,394.61 × 1,056.45
4. Step 4: Simplify right side
   2,931.81x = 4,642,685.73
5. Step 5: Solve for x
   x = 4,642,685.73/2,931.81
6. Step 6: Final answer
   x = 1,583.56