Finding the Fourth Proportional to 1,401.83, 2,103.11 and 427.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.83 : 2,103.11 = 427.94 : x
2. Step 2: Convert to fraction form
   1,401.83/2,103.11 = 427.94/x
3. Step 3: Cross multiply
   1,401.83x = 2,103.11 × 427.94
4. Step 4: Simplify right side
   1,401.83x = 900,004.89
5. Step 5: Solve for x
   x = 900,004.89/1,401.83
6. Step 6: Final answer
   x = 642.02