Finding the Fourth Proportional to 1,393.22, 1,920.60 and 1,061.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.22 : 1,920.60 = 1,061.06 : x
2. Step 2: Convert to fraction form
   1,393.22/1,920.60 = 1,061.06/x
3. Step 3: Cross multiply
   1,393.22x = 1,920.60 × 1,061.06
4. Step 4: Simplify right side
   1,393.22x = 2,037,871.84
5. Step 5: Solve for x
   x = 2,037,871.84/1,393.22
6. Step 6: Final answer
   x = 1,462.71