Finding the Fourth Proportional to 1,401.07, 1,933.47 and 803.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.07 : 1,933.47 = 803.55 : x
2. Step 2: Convert to fraction form
   1,401.07/1,933.47 = 803.55/x
3. Step 3: Cross multiply
   1,401.07x = 1,933.47 × 803.55
4. Step 4: Simplify right side
   1,401.07x = 1,553,630.76
5. Step 5: Solve for x
   x = 1,553,630.76/1,401.07
6. Step 6: Final answer
   x = 1,108.89