Finding the Fourth Proportional to 13,441.59, 20,164.82 and 5,123.70

Step by Step Solution

1. Step 1: Write the proportion equation
   13,441.59 : 20,164.82 = 5,123.70 : x
2. Step 2: Convert to fraction form
   13,441.59/20,164.82 = 5,123.70/x
3. Step 3: Cross multiply
   13,441.59x = 20,164.82 × 5,123.70
4. Step 4: Simplify right side
   13,441.59x = 103,318,462.62
5. Step 5: Solve for x
   x = 103,318,462.62/13,441.59
6. Step 6: Final answer
   x = 7,686.48