Finding the Fourth Proportional to 1,430.01, 1,973.47 and 800.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,430.01 : 1,973.47 = 800.57 : x
2. Step 2: Convert to fraction form
   1,430.01/1,973.47 = 800.57/x
3. Step 3: Cross multiply
   1,430.01x = 1,973.47 × 800.57
4. Step 4: Simplify right side
   1,430.01x = 1,579,900.88
5. Step 5: Solve for x
   x = 1,579,900.88/1,430.01
6. Step 6: Final answer
   x = 1,104.82