Finding the Fourth Proportional to 1,510.79, 2,085.12 and 881.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,510.79 : 2,085.12 = 881.69 : x
2. Step 2: Convert to fraction form
   1,510.79/2,085.12 = 881.69/x
3. Step 3: Cross multiply
   1,510.79x = 2,085.12 × 881.69
4. Step 4: Simplify right side
   1,510.79x = 1,838,419.03
5. Step 5: Solve for x
   x = 1,838,419.03/1,510.79
6. Step 6: Final answer
   x = 1,216.86