Finding the Fourth Proportional to 76,749.70, 105,922.34 and 42,763.72

Step by Step Solution

1. Step 1: Write the proportion equation
   76,749.70 : 105,922.34 = 42,763.72 : x
2. Step 2: Convert to fraction form
   76,749.70/105,922.34 = 42,763.72/x
3. Step 3: Cross multiply
   76,749.70x = 105,922.34 × 42,763.72
4. Step 4: Simplify right side
   76,749.70x = 4,529,633,289.50
5. Step 5: Solve for x
   x = 4,529,633,289.50/76,749.70
6. Step 6: Final answer
   x = 59,018.25