Finding the Fourth Proportional to 76,575.72, 105,665.28 and 42,575.67

Step by Step Solution

1. Step 1: Write the proportion equation
   76,575.72 : 105,665.28 = 42,575.67 : x
2. Step 2: Convert to fraction form
   76,575.72/105,665.28 = 42,575.67/x
3. Step 3: Cross multiply
   76,575.72x = 105,665.28 × 42,575.67
4. Step 4: Simplify right side
   76,575.72x = 4,498,770,091.74
5. Step 5: Solve for x
   x = 4,498,770,091.74/76,575.72
6. Step 6: Final answer
   x = 58,749.30