Finding the Fourth Proportional to 1,215.54, 1,820.34 and 953.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,215.54 : 1,820.34 = 953.37 : x
2. Step 2: Convert to fraction form
   1,215.54/1,820.34 = 953.37/x
3. Step 3: Cross multiply
   1,215.54x = 1,820.34 × 953.37
4. Step 4: Simplify right side
   1,215.54x = 1,735,457.55
5. Step 5: Solve for x
   x = 1,735,457.55/1,215.54
6. Step 6: Final answer
   x = 1,427.73