Finding the Fourth Proportional to 91,589.88, 137,404.42 and 28,408.62

Step by Step Solution

1. Step 1: Write the proportion equation
   91,589.88 : 137,404.42 = 28,408.62 : x
2. Step 2: Convert to fraction form
   91,589.88/137,404.42 = 28,408.62/x
3. Step 3: Cross multiply
   91,589.88x = 137,404.42 × 28,408.62
4. Step 4: Simplify right side
   91,589.88x = 3,903,469,954.10
5. Step 5: Solve for x
   x = 3,903,469,954.10/91,589.88
6. Step 6: Final answer
   x = 42,619.01