Finding the Fourth Proportional to 28,241.89, 42,377.69 and 13,448.05

Step by Step Solution

1. Step 1: Write the proportion equation
   28,241.89 : 42,377.69 = 13,448.05 : x
2. Step 2: Convert to fraction form
   28,241.89/42,377.69 = 13,448.05/x
3. Step 3: Cross multiply
   28,241.89x = 42,377.69 × 13,448.05
4. Step 4: Simplify right side
   28,241.89x = 569,897,226.76
5. Step 5: Solve for x
   x = 569,897,226.76/28,241.89
6. Step 6: Final answer
   x = 20,179.15