Finding the Fourth Proportional to 76,447.42, 105,493.86 and 42,458.10

Step by Step Solution

1. Step 1: Write the proportion equation
   76,447.42 : 105,493.86 = 42,458.10 : x
2. Step 2: Convert to fraction form
   76,447.42/105,493.86 = 42,458.10/x
3. Step 3: Cross multiply
   76,447.42x = 105,493.86 × 42,458.10
4. Step 4: Simplify right side
   76,447.42x = 4,479,068,857.27
5. Step 5: Solve for x
   x = 4,479,068,857.27/76,447.42
6. Step 6: Final answer
   x = 58,590.19