Finding the Fourth Proportional to 1,440.88, 1,987.73 and 851.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,440.88 : 1,987.73 = 851.02 : x
2. Step 2: Convert to fraction form
   1,440.88/1,987.73 = 851.02/x
3. Step 3: Cross multiply
   1,440.88x = 1,987.73 × 851.02
4. Step 4: Simplify right side
   1,440.88x = 1,691,597.98
5. Step 5: Solve for x
   x = 1,691,597.98/1,440.88
6. Step 6: Final answer
   x = 1,174.00