Finding the Fourth Proportional to 1,430.22, 1,973.56 and 800.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,430.22 : 1,973.56 = 800.72 : x
2. Step 2: Convert to fraction form
   1,430.22/1,973.56 = 800.72/x
3. Step 3: Cross multiply
   1,430.22x = 1,973.56 × 800.72
4. Step 4: Simplify right side
   1,430.22x = 1,580,268.96
5. Step 5: Solve for x
   x = 1,580,268.96/1,430.22
6. Step 6: Final answer
   x = 1,104.91