Finding the Fourth Proportional to 1,770.82, 2,654.12 and 990.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,770.82 : 2,654.12 = 990.38 : x
2. Step 2: Convert to fraction form
   1,770.82/2,654.12 = 990.38/x
3. Step 3: Cross multiply
   1,770.82x = 2,654.12 × 990.38
4. Step 4: Simplify right side
   1,770.82x = 2,628,587.37
5. Step 5: Solve for x
   x = 2,628,587.37/1,770.82
6. Step 6: Final answer
   x = 1,484.39