Finding the Fourth Proportional to 1,345.41, 1,857.48 and 1,066.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.41 : 1,857.48 = 1,066.77 : x
2. Step 2: Convert to fraction form
   1,345.41/1,857.48 = 1,066.77/x
3. Step 3: Cross multiply
   1,345.41x = 1,857.48 × 1,066.77
4. Step 4: Simplify right side
   1,345.41x = 1,981,503.94
5. Step 5: Solve for x
   x = 1,981,503.94/1,345.41
6. Step 6: Final answer
   x = 1,472.79