Finding the Fourth Proportional to 1,354.39, 1,868.97 and 764.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,354.39 : 1,868.97 = 764.89 : x
2. Step 2: Convert to fraction form
   1,354.39/1,868.97 = 764.89/x
3. Step 3: Cross multiply
   1,354.39x = 1,868.97 × 764.89
4. Step 4: Simplify right side
   1,354.39x = 1,429,556.46
5. Step 5: Solve for x
   x = 1,429,556.46/1,354.39
6. Step 6: Final answer
   x = 1,055.50