Finding the Fourth Proportional to 1,905.40, 2,629.56 and 1,066.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,905.40 : 2,629.56 = 1,066.12 : x
2. Step 2: Convert to fraction form
   1,905.40/2,629.56 = 1,066.12/x
3. Step 3: Cross multiply
   1,905.40x = 2,629.56 × 1,066.12
4. Step 4: Simplify right side
   1,905.40x = 2,803,426.51
5. Step 5: Solve for x
   x = 2,803,426.51/1,905.40
6. Step 6: Final answer
   x = 1,471.31