Finding the Fourth Proportional to 91,578.59, 126,379.71 and 59,729.21

Step by Step Solution

1. Step 1: Write the proportion equation
   91,578.59 : 126,379.71 = 59,729.21 : x
2. Step 2: Convert to fraction form
   91,578.59/126,379.71 = 59,729.21/x
3. Step 3: Cross multiply
   91,578.59x = 126,379.71 × 59,729.21
4. Step 4: Simplify right side
   91,578.59x = 7,548,559,606.43
5. Step 5: Solve for x
   x = 7,548,559,606.43/91,578.59
6. Step 6: Final answer
   x = 82,427.13