Finding the Fourth Proportional to 3,779.31, 5,215.09 and 3,500.67

Step by Step Solution

1. Step 1: Write the proportion equation
   3,779.31 : 5,215.09 = 3,500.67 : x
2. Step 2: Convert to fraction form
   3,779.31/5,215.09 = 3,500.67/x
3. Step 3: Cross multiply
   3,779.31x = 5,215.09 × 3,500.67
4. Step 4: Simplify right side
   3,779.31x = 18,256,322.15
5. Step 5: Solve for x
   x = 18,256,322.15/3,779.31
6. Step 6: Final answer
   x = 4,830.59