Finding the Fourth Proportional to 76,447.91, 105,494.59 and 42,458.55

Step by Step Solution

1. Step 1: Write the proportion equation
   76,447.91 : 105,494.59 = 42,458.55 : x
2. Step 2: Convert to fraction form
   76,447.91/105,494.59 = 42,458.55/x
3. Step 3: Cross multiply
   76,447.91x = 105,494.59 × 42,458.55
4. Step 4: Simplify right side
   76,447.91x = 4,479,147,324.24
5. Step 5: Solve for x
   x = 4,479,147,324.24/76,447.91
6. Step 6: Final answer
   x = 58,590.84