Finding the Fourth Proportional to 1,770.56, 2,658.72 and 1,090.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,770.56 : 2,658.72 = 1,090.88 : x
2. Step 2: Convert to fraction form
   1,770.56/2,658.72 = 1,090.88/x
3. Step 3: Cross multiply
   1,770.56x = 2,658.72 × 1,090.88
4. Step 4: Simplify right side
   1,770.56x = 2,900,344.47
5. Step 5: Solve for x
   x = 2,900,344.47/1,770.56
6. Step 6: Final answer
   x = 1,638.09