Finding the Fourth Proportional to 1,066.30, 1,469.78 and 841.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.30 : 1,469.78 = 841.86 : x
2. Step 2: Convert to fraction form
   1,066.30/1,469.78 = 841.86/x
3. Step 3: Cross multiply
   1,066.30x = 1,469.78 × 841.86
4. Step 4: Simplify right side
   1,066.30x = 1,237,348.99
5. Step 5: Solve for x
   x = 1,237,348.99/1,066.30
6. Step 6: Final answer
   x = 1,160.41