Finding the Fourth Proportional to 1,353.30, 1,865.75 and 1,015.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.30 : 1,865.75 = 1,015.77 : x
2. Step 2: Convert to fraction form
   1,353.30/1,865.75 = 1,015.77/x
3. Step 3: Cross multiply
   1,353.30x = 1,865.75 × 1,015.77
4. Step 4: Simplify right side
   1,353.30x = 1,895,172.88
5. Step 5: Solve for x
   x = 1,895,172.88/1,353.30
6. Step 6: Final answer
   x = 1,400.41