Finding the Fourth Proportional to 1,510.83, 2,085.41 and 921.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,510.83 : 2,085.41 = 921.35 : x
2. Step 2: Convert to fraction form
   1,510.83/2,085.41 = 921.35/x
3. Step 3: Cross multiply
   1,510.83x = 2,085.41 × 921.35
4. Step 4: Simplify right side
   1,510.83x = 1,921,392.50
5. Step 5: Solve for x
   x = 1,921,392.50/1,510.83
6. Step 6: Final answer
   x = 1,271.75