Finding the Fourth Proportional to 90,589.72, 135,900.50 and 34,434.74

Step by Step Solution

1. Step 1: Write the proportion equation
   90,589.72 : 135,900.50 = 34,434.74 : x
2. Step 2: Convert to fraction form
   90,589.72/135,900.50 = 34,434.74/x
3. Step 3: Cross multiply
   90,589.72x = 135,900.50 × 34,434.74
4. Step 4: Simplify right side
   90,589.72x = 4,679,697,531.69
5. Step 5: Solve for x
   x = 4,679,697,531.69/90,589.72
6. Step 6: Final answer
   x = 51,658.15