Finding the Fourth Proportional to 51,404.42, 77,418.79 and 45,245.59

Step by Step Solution

1. Step 1: Write the proportion equation
   51,404.42 : 77,418.79 = 45,245.59 : x
2. Step 2: Convert to fraction form
   51,404.42/77,418.79 = 45,245.59/x
3. Step 3: Cross multiply
   51,404.42x = 77,418.79 × 45,245.59
4. Step 4: Simplify right side
   51,404.42x = 3,502,858,523.98
5. Step 5: Solve for x
   x = 3,502,858,523.98/51,404.42
6. Step 6: Final answer
   x = 68,143.14