Finding the Fourth Proportional to 1,071.81, 1,477.85 and 994.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,071.81 : 1,477.85 = 994.05 : x
2. Step 2: Convert to fraction form
   1,071.81/1,477.85 = 994.05/x
3. Step 3: Cross multiply
   1,071.81x = 1,477.85 × 994.05
4. Step 4: Simplify right side
   1,071.81x = 1,469,051.82
5. Step 5: Solve for x
   x = 1,469,051.82/1,071.81
6. Step 6: Final answer
   x = 1,370.63