Finding the Fourth Proportional to 1,770.71, 2,442.53 and 1,210.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,770.71 : 2,442.53 = 1,210.89 : x
2. Step 2: Convert to fraction form
   1,770.71/2,442.53 = 1,210.89/x
3. Step 3: Cross multiply
   1,770.71x = 2,442.53 × 1,210.89
4. Step 4: Simplify right side
   1,770.71x = 2,957,629.10
5. Step 5: Solve for x
   x = 2,957,629.10/1,770.71
6. Step 6: Final answer
   x = 1,670.31