Finding the Fourth Proportional to 1,428.84, 2,142.32 and 698.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,428.84 : 2,142.32 = 698.00 : x
2. Step 2: Convert to fraction form
   1,428.84/2,142.32 = 698.00/x
3. Step 3: Cross multiply
   1,428.84x = 2,142.32 × 698.00
4. Step 4: Simplify right side
   1,428.84x = 1,495,325.16
5. Step 5: Solve for x
   x = 1,495,325.16/1,428.84
6. Step 6: Final answer
   x = 1,046.53