Finding the Fourth Proportional to 1,393.42, 1,921.76 and 973.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.42 : 1,921.76 = 973.25 : x
2. Step 2: Convert to fraction form
   1,393.42/1,921.76 = 973.25/x
3. Step 3: Cross multiply
   1,393.42x = 1,921.76 × 973.25
4. Step 4: Simplify right side
   1,393.42x = 1,870,352.92
5. Step 5: Solve for x
   x = 1,870,352.92/1,393.42
6. Step 6: Final answer
   x = 1,342.28