Finding the Fourth Proportional to 1,510.04, 2,269.16 and 780.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,510.04 : 2,269.16 = 780.18 : x
2. Step 2: Convert to fraction form
   1,510.04/2,269.16 = 780.18/x
3. Step 3: Cross multiply
   1,510.04x = 2,269.16 × 780.18
4. Step 4: Simplify right side
   1,510.04x = 1,770,353.25
5. Step 5: Solve for x
   x = 1,770,353.25/1,510.04
6. Step 6: Final answer
   x = 1,172.39