Finding the Fourth Proportional to 2,455.67, 3,389.01 and 1,407.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,455.67 : 3,389.01 = 1,407.89 : x
2. Step 2: Convert to fraction form
   2,455.67/3,389.01 = 1,407.89/x
3. Step 3: Cross multiply
   2,455.67x = 3,389.01 × 1,407.89
4. Step 4: Simplify right side
   2,455.67x = 4,771,353.29
5. Step 5: Solve for x
   x = 4,771,353.29/2,455.67
6. Step 6: Final answer
   x = 1,942.99