Finding the Fourth Proportional to 1,945.34, 2,918.53 and 1,020.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,945.34 : 2,918.53 = 1,020.65 : x
2. Step 2: Convert to fraction form
   1,945.34/2,918.53 = 1,020.65/x
3. Step 3: Cross multiply
   1,945.34x = 2,918.53 × 1,020.65
4. Step 4: Simplify right side
   1,945.34x = 2,978,780.50
5. Step 5: Solve for x
   x = 2,978,780.50/1,945.34
6. Step 6: Final answer
   x = 1,531.24