Finding the Fourth Proportional to 1,353.57, 1,867.91 and 764.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.57 : 1,867.91 = 764.09 : x
2. Step 2: Convert to fraction form
   1,353.57/1,867.91 = 764.09/x
3. Step 3: Cross multiply
   1,353.57x = 1,867.91 × 764.09
4. Step 4: Simplify right side
   1,353.57x = 1,427,251.35
5. Step 5: Solve for x
   x = 1,427,251.35/1,353.57
6. Step 6: Final answer
   x = 1,054.43