Finding the Fourth Proportional to 1,401.90, 2,102.91 and 477.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.90 : 2,102.91 = 477.42 : x
2. Step 2: Convert to fraction form
   1,401.90/2,102.91 = 477.42/x
3. Step 3: Cross multiply
   1,401.90x = 2,102.91 × 477.42
4. Step 4: Simplify right side
   1,401.90x = 1,003,971.29
5. Step 5: Solve for x
   x = 1,003,971.29/1,401.90
6. Step 6: Final answer
   x = 716.15