Finding the Fourth Proportional to 1,428.93, 2,144.00 and 698.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,428.93 : 2,144.00 = 698.31 : x
2. Step 2: Convert to fraction form
   1,428.93/2,144.00 = 698.31/x
3. Step 3: Cross multiply
   1,428.93x = 2,144.00 × 698.31
4. Step 4: Simplify right side
   1,428.93x = 1,497,173.15
5. Step 5: Solve for x
   x = 1,497,173.15/1,428.93
6. Step 6: Final answer
   x = 1,047.76