Finding the Fourth Proportional to 1,353.81, 1,868.06 and 764.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.81 : 1,868.06 = 764.34 : x
2. Step 2: Convert to fraction form
   1,353.81/1,868.06 = 764.34/x
3. Step 3: Cross multiply
   1,353.81x = 1,868.06 × 764.34
4. Step 4: Simplify right side
   1,353.81x = 1,427,827.89
5. Step 5: Solve for x
   x = 1,427,827.89/1,353.81
6. Step 6: Final answer
   x = 1,054.67