Finding the Fourth Proportional to 1,347.84, 2,019.72 and 800.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,347.84 : 2,019.72 = 800.28 : x
2. Step 2: Convert to fraction form
   1,347.84/2,019.72 = 800.28/x
3. Step 3: Cross multiply
   1,347.84x = 2,019.72 × 800.28
4. Step 4: Simplify right side
   1,347.84x = 1,616,341.52
5. Step 5: Solve for x
   x = 1,616,341.52/1,347.84
6. Step 6: Final answer
   x = 1,199.21