Finding the Fourth Proportional to 91,780.59, 137,615.43 and 41,170.35

Step by Step Solution

1. Step 1: Write the proportion equation
   91,780.59 : 137,615.43 = 41,170.35 : x
2. Step 2: Convert to fraction form
   91,780.59/137,615.43 = 41,170.35/x
3. Step 3: Cross multiply
   91,780.59x = 137,615.43 × 41,170.35
4. Step 4: Simplify right side
   91,780.59x = 5,665,675,418.50
5. Step 5: Solve for x
   x = 5,665,675,418.50/91,780.59
6. Step 6: Final answer
   x = 61,730.65