Finding the Fourth Proportional to 1,401.88, 2,099.40 and 1,054.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.88 : 2,099.40 = 1,054.84 : x
2. Step 2: Convert to fraction form
   1,401.88/2,099.40 = 1,054.84/x
3. Step 3: Cross multiply
   1,401.88x = 2,099.40 × 1,054.84
4. Step 4: Simplify right side
   1,401.88x = 2,214,531.10
5. Step 5: Solve for x
   x = 2,214,531.10/1,401.88
6. Step 6: Final answer
   x = 1,579.69