Finding the Fourth Proportional to 1,905.72, 2,629.91 and 1,066.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,905.72 : 2,629.91 = 1,066.47 : x
2. Step 2: Convert to fraction form
   1,905.72/2,629.91 = 1,066.47/x
3. Step 3: Cross multiply
   1,905.72x = 2,629.91 × 1,066.47
4. Step 4: Simplify right side
   1,905.72x = 2,804,720.12
5. Step 5: Solve for x
   x = 2,804,720.12/1,905.72
6. Step 6: Final answer
   x = 1,471.74