Finding the Fourth Proportional to 1,930.69, 2,664.81 and 1,145.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,930.69 : 2,664.81 = 1,145.19 : x
2. Step 2: Convert to fraction form
   1,930.69/2,664.81 = 1,145.19/x
3. Step 3: Cross multiply
   1,930.69x = 2,664.81 × 1,145.19
4. Step 4: Simplify right side
   1,930.69x = 3,051,713.76
5. Step 5: Solve for x
   x = 3,051,713.76/1,930.69
6. Step 6: Final answer
   x = 1,580.64