Finding the Fourth Proportional to 1,401.78, 1,930.81 and 1,066.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.78 : 1,930.81 = 1,066.98 : x
2. Step 2: Convert to fraction form
   1,401.78/1,930.81 = 1,066.98/x
3. Step 3: Cross multiply
   1,401.78x = 1,930.81 × 1,066.98
4. Step 4: Simplify right side
   1,401.78x = 2,060,135.65
5. Step 5: Solve for x
   x = 2,060,135.65/1,401.78
6. Step 6: Final answer
   x = 1,469.66