Finding the Fourth Proportional to 1,354.15, 1,868.50 and 764.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,354.15 : 1,868.50 = 764.67 : x
2. Step 2: Convert to fraction form
   1,354.15/1,868.50 = 764.67/x
3. Step 3: Cross multiply
   1,354.15x = 1,868.50 × 764.67
4. Step 4: Simplify right side
   1,354.15x = 1,428,793.86
5. Step 5: Solve for x
   x = 1,428,793.86/1,354.15
6. Step 6: Final answer
   x = 1,055.12