Finding the Fourth Proportional to 5,106.45, 7,659.72 and 1,408.89

Step by Step Solution

1. Step 1: Write the proportion equation
   5,106.45 : 7,659.72 = 1,408.89 : x
2. Step 2: Convert to fraction form
   5,106.45/7,659.72 = 1,408.89/x
3. Step 3: Cross multiply
   5,106.45x = 7,659.72 × 1,408.89
4. Step 4: Simplify right side
   5,106.45x = 10,791,702.91
5. Step 5: Solve for x
   x = 10,791,702.91/5,106.45
6. Step 6: Final answer
   x = 2,113.35