Finding the Fourth Proportional to 1,179.93, 1,770.27 and 920.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,179.93 : 1,770.27 = 920.82 : x
2. Step 2: Convert to fraction form
   1,179.93/1,770.27 = 920.82/x
3. Step 3: Cross multiply
   1,179.93x = 1,770.27 × 920.82
4. Step 4: Simplify right side
   1,179.93x = 1,630,086.57
5. Step 5: Solve for x
   x = 1,630,086.57/1,179.93
6. Step 6: Final answer
   x = 1,381.51