Finding the Fourth Proportional to 13,445.83, 20,173.15 and 4,086.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,445.83 : 20,173.15 = 4,086.25 : x
2. Step 2: Convert to fraction form
   13,445.83/20,173.15 = 4,086.25/x
3. Step 3: Cross multiply
   13,445.83x = 20,173.15 × 4,086.25
4. Step 4: Simplify right side
   13,445.83x = 82,432,488.86
5. Step 5: Solve for x
   x = 82,432,488.86/13,445.83
6. Step 6: Final answer
   x = 6,130.71