Finding the Fourth Proportional to 1,510.19, 2,084.17 and 920.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,510.19 : 2,084.17 = 920.65 : x
2. Step 2: Convert to fraction form
   1,510.19/2,084.17 = 920.65/x
3. Step 3: Cross multiply
   1,510.19x = 2,084.17 × 920.65
4. Step 4: Simplify right side
   1,510.19x = 1,918,780.69
5. Step 5: Solve for x
   x = 1,918,780.69/1,510.19
6. Step 6: Final answer
   x = 1,270.56