Finding the Fourth Proportional to 1,353.61, 1,867.98 and 764.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.61 : 1,867.98 = 764.15 : x
2. Step 2: Convert to fraction form
   1,353.61/1,867.98 = 764.15/x
3. Step 3: Cross multiply
   1,353.61x = 1,867.98 × 764.15
4. Step 4: Simplify right side
   1,353.61x = 1,427,412.25
5. Step 5: Solve for x
   x = 1,427,412.25/1,353.61
6. Step 6: Final answer
   x = 1,054.52