Finding the Fourth Proportional to 1,381.51, 1,905.05 and 1,066.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,381.51 : 1,905.05 = 1,066.82 : x
2. Step 2: Convert to fraction form
   1,381.51/1,905.05 = 1,066.82/x
3. Step 3: Cross multiply
   1,381.51x = 1,905.05 × 1,066.82
4. Step 4: Simplify right side
   1,381.51x = 2,032,347.54
5. Step 5: Solve for x
   x = 2,032,347.54/1,381.51
6. Step 6: Final answer
   x = 1,471.11