Finding the Fourth Proportional to 76,438.05, 105,480.95 and 42,448.71

Step by Step Solution

1. Step 1: Write the proportion equation
   76,438.05 : 105,480.95 = 42,448.71 : x
2. Step 2: Convert to fraction form
   76,438.05/105,480.95 = 42,448.71/x
3. Step 3: Cross multiply
   76,438.05x = 105,480.95 × 42,448.71
4. Step 4: Simplify right side
   76,438.05x = 4,477,530,085.83
5. Step 5: Solve for x
   x = 4,477,530,085.83/76,438.05
6. Step 6: Final answer
   x = 58,577.24