Finding the Fourth Proportional to 1,510.15, 2,085.18 and 979.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,510.15 : 2,085.18 = 979.28 : x
2. Step 2: Convert to fraction form
   1,510.15/2,085.18 = 979.28/x
3. Step 3: Cross multiply
   1,510.15x = 2,085.18 × 979.28
4. Step 4: Simplify right side
   1,510.15x = 2,041,975.07
5. Step 5: Solve for x
   x = 2,041,975.07/1,510.15
6. Step 6: Final answer
   x = 1,352.17