Finding the Fourth Proportional to 1,191.06, 1,778.45 and 1,066.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.06 : 1,778.45 = 1,066.86 : x
2. Step 2: Convert to fraction form
   1,191.06/1,778.45 = 1,066.86/x
3. Step 3: Cross multiply
   1,191.06x = 1,778.45 × 1,066.86
4. Step 4: Simplify right side
   1,191.06x = 1,897,351.83
5. Step 5: Solve for x
   x = 1,897,351.83/1,191.06
6. Step 6: Final answer
   x = 1,592.99