Finding the Fourth Proportional to 1,942.21, 2,910.69 and 1,393.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,942.21 : 2,910.69 = 1,393.19 : x
2. Step 2: Convert to fraction form
   1,942.21/2,910.69 = 1,393.19/x
3. Step 3: Cross multiply
   1,942.21x = 2,910.69 × 1,393.19
4. Step 4: Simplify right side
   1,942.21x = 4,055,144.20
5. Step 5: Solve for x
   x = 4,055,144.20/1,942.21
6. Step 6: Final answer
   x = 2,087.90