Finding the Fourth Proportional to 1,010.88, 1,517.00 and 873.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,010.88 : 1,517.00 = 873.72 : x
2. Step 2: Convert to fraction form
   1,010.88/1,517.00 = 873.72/x
3. Step 3: Cross multiply
   1,010.88x = 1,517.00 × 873.72
4. Step 4: Simplify right side
   1,010.88x = 1,325,428.87
5. Step 5: Solve for x
   x = 1,325,428.87/1,010.88
6. Step 6: Final answer
   x = 1,311.16