Finding the Fourth Proportional to 1,770.95, 2,654.71 and 991.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,770.95 : 2,654.71 = 991.33 : x
2. Step 2: Convert to fraction form
   1,770.95/2,654.71 = 991.33/x
3. Step 3: Cross multiply
   1,770.95x = 2,654.71 × 991.33
4. Step 4: Simplify right side
   1,770.95x = 2,631,684.55
5. Step 5: Solve for x
   x = 2,631,684.55/1,770.95
6. Step 6: Final answer
   x = 1,486.03