Finding the Fourth Proportional to 76,815.60, 105,996.94 and 42,821.52

Step by Step Solution

1. Step 1: Write the proportion equation
   76,815.60 : 105,996.94 = 42,821.52 : x
2. Step 2: Convert to fraction form
   76,815.60/105,996.94 = 42,821.52/x
3. Step 3: Cross multiply
   76,815.60x = 105,996.94 × 42,821.52
4. Step 4: Simplify right side
   76,815.60x = 4,538,950,086.15
5. Step 5: Solve for x
   x = 4,538,950,086.15/76,815.60
6. Step 6: Final answer
   x = 59,088.91