Finding the Fourth Proportional to 1,510.57, 2,084.40 and 881.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,510.57 : 2,084.40 = 881.31 : x
2. Step 2: Convert to fraction form
   1,510.57/2,084.40 = 881.31/x
3. Step 3: Cross multiply
   1,510.57x = 2,084.40 × 881.31
4. Step 4: Simplify right side
   1,510.57x = 1,836,987.74
5. Step 5: Solve for x
   x = 1,836,987.74/1,510.57
6. Step 6: Final answer
   x = 1,216.09