Finding the Fourth Proportional to 76,384.05, 105,408.42 and 42,392.28

Step by Step Solution

1. Step 1: Write the proportion equation
   76,384.05 : 105,408.42 = 42,392.28 : x
2. Step 2: Convert to fraction form
   76,384.05/105,408.42 = 42,392.28/x
3. Step 3: Cross multiply
   76,384.05x = 105,408.42 × 42,392.28
4. Step 4: Simplify right side
   76,384.05x = 4,468,503,255.00
5. Step 5: Solve for x
   x = 4,468,503,255.00/76,384.05
6. Step 6: Final answer
   x = 58,500.48