Finding the Fourth Proportional to 1,430.30, 2,145.18 and 699.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,430.30 : 2,145.18 = 699.42 : x
2. Step 2: Convert to fraction form
   1,430.30/2,145.18 = 699.42/x
3. Step 3: Cross multiply
   1,430.30x = 2,145.18 × 699.42
4. Step 4: Simplify right side
   1,430.30x = 1,500,381.80
5. Step 5: Solve for x
   x = 1,500,381.80/1,430.30
6. Step 6: Final answer
   x = 1,049.00