Finding the Fourth Proportional to 76,783.46, 105,964.46 and 42,792

Step by Step Solution

1. Step 1: Write the proportion equation
   76,783.46 : 105,964.46 = 42,792 : x
2. Step 2: Convert to fraction form
   76,783.46/105,964.46 = 42,792/x
3. Step 3: Cross multiply
   76,783.46x = 105,964.46 × 42,792
4. Step 4: Simplify right side
   76,783.46x = 4,534,431,172.32
5. Step 5: Solve for x
   x = 4,534,431,172.32/76,783.46
6. Step 6: Final answer
   x = 59,054.79