Finding the Fourth Proportional to 1,510.39, 2,085.02 and 921.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,510.39 : 2,085.02 = 921.16 : x
2. Step 2: Convert to fraction form
   1,510.39/2,085.02 = 921.16/x
3. Step 3: Cross multiply
   1,510.39x = 2,085.02 × 921.16
4. Step 4: Simplify right side
   1,510.39x = 1,920,637.02
5. Step 5: Solve for x
   x = 1,920,637.02/1,510.39
6. Step 6: Final answer
   x = 1,271.62