Finding the Fourth Proportional to 76,749.76, 105,912.33 and 42,758.23

Step by Step Solution

1. Step 1: Write the proportion equation
   76,749.76 : 105,912.33 = 42,758.23 : x
2. Step 2: Convert to fraction form
   76,749.76/105,912.33 = 42,758.23/x
3. Step 3: Cross multiply
   76,749.76x = 105,912.33 × 42,758.23
4. Step 4: Simplify right side
   76,749.76x = 4,528,623,765.98
5. Step 5: Solve for x
   x = 4,528,623,765.98/76,749.76
6. Step 6: Final answer
   x = 59,005.05