Finding the Fourth Proportional to 78,434.40, 108,238.94 and 42,624.41

Step by Step Solution

1. Step 1: Write the proportion equation
   78,434.40 : 108,238.94 = 42,624.41 : x
2. Step 2: Convert to fraction form
   78,434.40/108,238.94 = 42,624.41/x
3. Step 3: Cross multiply
   78,434.40x = 108,238.94 × 42,624.41
4. Step 4: Simplify right side
   78,434.40x = 4,613,620,415.33
5. Step 5: Solve for x
   x = 4,613,620,415.33/78,434.40
6. Step 6: Final answer
   x = 58,821.39