Finding the Fourth Proportional to 1,770.28, 2,654.51 and 1,215.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,770.28 : 2,654.51 = 1,215.83 : x
2. Step 2: Convert to fraction form
   1,770.28/2,654.51 = 1,215.83/x
3. Step 3: Cross multiply
   1,770.28x = 2,654.51 × 1,215.83
4. Step 4: Simplify right side
   1,770.28x = 3,227,433.45
5. Step 5: Solve for x
   x = 3,227,433.45/1,770.28
6. Step 6: Final answer
   x = 1,823.12