Finding the Fourth Proportional to 2,103.84, 3,156.57 and 805.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.84 : 3,156.57 = 805.01 : x
2. Step 2: Convert to fraction form
   2,103.84/3,156.57 = 805.01/x
3. Step 3: Cross multiply
   2,103.84x = 3,156.57 × 805.01
4. Step 4: Simplify right side
   2,103.84x = 2,541,054.63
5. Step 5: Solve for x
   x = 2,541,054.63/2,103.84
6. Step 6: Final answer
   x = 1,207.82