Finding the Fourth Proportional to 7,758.35, 10,706.79 and 4,221.69

Step by Step Solution

1. Step 1: Write the proportion equation
   7,758.35 : 10,706.79 = 4,221.69 : x
2. Step 2: Convert to fraction form
   7,758.35/10,706.79 = 4,221.69/x
3. Step 3: Cross multiply
   7,758.35x = 10,706.79 × 4,221.69
4. Step 4: Simplify right side
   7,758.35x = 45,200,748.28
5. Step 5: Solve for x
   x = 45,200,748.28/7,758.35
6. Step 6: Final answer
   x = 5,826.08