Finding the Fourth Proportional to 76,288, 105,283.92 and 42,760.48

Step by Step Solution

1. Step 1: Write the proportion equation
   76,288 : 105,283.92 = 42,760.48 : x
2. Step 2: Convert to fraction form
   76,288/105,283.92 = 42,760.48/x
3. Step 3: Cross multiply
   76,288x = 105,283.92 × 42,760.48
4. Step 4: Simplify right side
   76,288x = 4,501,990,955.48
5. Step 5: Solve for x
   x = 4,501,990,955.48/76,288
6. Step 6: Final answer
   x = 59,013.09