Finding the Fourth Proportional to 25,900.05, 38,878.89 and 13,416.74

Step by Step Solution

1. Step 1: Write the proportion equation
   25,900.05 : 38,878.89 = 13,416.74 : x
2. Step 2: Convert to fraction form
   25,900.05/38,878.89 = 13,416.74/x
3. Step 3: Cross multiply
   25,900.05x = 38,878.89 × 13,416.74
4. Step 4: Simplify right side
   25,900.05x = 521,627,859.71
5. Step 5: Solve for x
   x = 521,627,859.71/25,900.05
6. Step 6: Final answer
   x = 20,140.03