Finding the Fourth Proportional to 1,354.28, 1,868.74 and 764.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,354.28 : 1,868.74 = 764.69 : x
2. Step 2: Convert to fraction form
   1,354.28/1,868.74 = 764.69/x
3. Step 3: Cross multiply
   1,354.28x = 1,868.74 × 764.69
4. Step 4: Simplify right side
   1,354.28x = 1,429,009.55
5. Step 5: Solve for x
   x = 1,429,009.55/1,354.28
6. Step 6: Final answer
   x = 1,055.18