Finding the Fourth Proportional to 1,764.34, 2,434.29 and 1,390.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.34 : 2,434.29 = 1,390.15 : x
2. Step 2: Convert to fraction form
   1,764.34/2,434.29 = 1,390.15/x
3. Step 3: Cross multiply
   1,764.34x = 2,434.29 × 1,390.15
4. Step 4: Simplify right side
   1,764.34x = 3,384,021.29
5. Step 5: Solve for x
   x = 3,384,021.29/1,764.34
6. Step 6: Final answer
   x = 1,918.02