Finding the Fourth Proportional to 1,401.50, 2,102.15 and 477.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.50 : 2,102.15 = 477.09 : x
2. Step 2: Convert to fraction form
   1,401.50/2,102.15 = 477.09/x
3. Step 3: Cross multiply
   1,401.50x = 2,102.15 × 477.09
4. Step 4: Simplify right side
   1,401.50x = 1,002,915.94
5. Step 5: Solve for x
   x = 1,002,915.94/1,401.50
6. Step 6: Final answer
   x = 715.60