Finding the Fourth Proportional to 1,401.90, 2,113.49 and 1,401.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.90 : 2,113.49 = 1,401.90 : x
2. Step 2: Convert to fraction form
   1,401.90/2,113.49 = 1,401.90/x
3. Step 3: Cross multiply
   1,401.90x = 2,113.49 × 1,401.90
4. Step 4: Simplify right side
   1,401.90x = 2,962,900.96
5. Step 5: Solve for x
   x = 2,962,900.96/1,401.90
6. Step 6: Final answer
   x = 2,113.49