Finding the Fourth Proportional to 53,350.80, 73,629.81 and 30,690.78

Step by Step Solution

1. Step 1: Write the proportion equation
   53,350.80 : 73,629.81 = 30,690.78 : x
2. Step 2: Convert to fraction form
   53,350.80/73,629.81 = 30,690.78/x
3. Step 3: Cross multiply
   53,350.80x = 73,629.81 × 30,690.78
4. Step 4: Simplify right side
   53,350.80x = 2,259,756,300.15
5. Step 5: Solve for x
   x = 2,259,756,300.15/53,350.80
6. Step 6: Final answer
   x = 42,356.56