Finding the Fourth Proportional to 76,447.92, 105,494.55 and 42,458.60

Step by Step Solution

1. Step 1: Write the proportion equation
   76,447.92 : 105,494.55 = 42,458.60 : x
2. Step 2: Convert to fraction form
   76,447.92/105,494.55 = 42,458.60/x
3. Step 3: Cross multiply
   76,447.92x = 105,494.55 × 42,458.60
4. Step 4: Simplify right side
   76,447.92x = 4,479,150,900.63
5. Step 5: Solve for x
   x = 4,479,150,900.63/76,447.92
6. Step 6: Final answer
   x = 58,590.88