Finding the Fourth Proportional to 1,510.94, 2,085.26 and 921.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,510.94 : 2,085.26 = 921.47 : x
2. Step 2: Convert to fraction form
   1,510.94/2,085.26 = 921.47/x
3. Step 3: Cross multiply
   1,510.94x = 2,085.26 × 921.47
4. Step 4: Simplify right side
   1,510.94x = 1,921,489.50
5. Step 5: Solve for x
   x = 1,921,489.50/1,510.94
6. Step 6: Final answer
   x = 1,271.72