Finding the Fourth Proportional to 76,799.97, 105,990.12 and 42,819.47

Step by Step Solution

1. Step 1: Write the proportion equation
   76,799.97 : 105,990.12 = 42,819.47 : x
2. Step 2: Convert to fraction form
   76,799.97/105,990.12 = 42,819.47/x
3. Step 3: Cross multiply
   76,799.97x = 105,990.12 × 42,819.47
4. Step 4: Simplify right side
   76,799.97x = 4,538,440,233.69
5. Step 5: Solve for x
   x = 4,538,440,233.69/76,799.97
6. Step 6: Final answer
   x = 59,094.30