Finding the Fourth Proportional to 1,314.69, 1,971.94 and 340.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,314.69 : 1,971.94 = 340.76 : x
2. Step 2: Convert to fraction form
   1,314.69/1,971.94 = 340.76/x
3. Step 3: Cross multiply
   1,314.69x = 1,971.94 × 340.76
4. Step 4: Simplify right side
   1,314.69x = 671,958.27
5. Step 5: Solve for x
   x = 671,958.27/1,314.69
6. Step 6: Final answer
   x = 511.12