Finding the Fourth Proportional to 1,930.62, 2,890.78 and 1,315.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,930.62 : 2,890.78 = 1,315.53 : x
2. Step 2: Convert to fraction form
   1,930.62/2,890.78 = 1,315.53/x
3. Step 3: Cross multiply
   1,930.62x = 2,890.78 × 1,315.53
4. Step 4: Simplify right side
   1,930.62x = 3,802,907.81
5. Step 5: Solve for x
   x = 3,802,907.81/1,930.62
6. Step 6: Final answer
   x = 1,969.79