Finding the Fourth Proportional to 91,453.92, 126,217.98 and 55,641.78

Step by Step Solution

1. Step 1: Write the proportion equation
   91,453.92 : 126,217.98 = 55,641.78 : x
2. Step 2: Convert to fraction form
   91,453.92/126,217.98 = 55,641.78/x
3. Step 3: Cross multiply
   91,453.92x = 126,217.98 × 55,641.78
4. Step 4: Simplify right side
   91,453.92x = 7,022,993,075.20
5. Step 5: Solve for x
   x = 7,022,993,075.20/91,453.92
6. Step 6: Final answer
   x = 76,792.70