Finding the Fourth Proportional to 1,430.43, 1,973.82 and 800.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,430.43 : 1,973.82 = 800.99 : x
2. Step 2: Convert to fraction form
   1,430.43/1,973.82 = 800.99/x
3. Step 3: Cross multiply
   1,430.43x = 1,973.82 × 800.99
4. Step 4: Simplify right side
   1,430.43x = 1,581,010.08
5. Step 5: Solve for x
   x = 1,581,010.08/1,430.43
6. Step 6: Final answer
   x = 1,105.27