Finding the Fourth Proportional to 76,508.93, 105,582.38 and 42,520.58

Step by Step Solution

1. Step 1: Write the proportion equation
   76,508.93 : 105,582.38 = 42,520.58 : x
2. Step 2: Convert to fraction form
   76,508.93/105,582.38 = 42,520.58/x
3. Step 3: Cross multiply
   76,508.93x = 105,582.38 × 42,520.58
4. Step 4: Simplify right side
   76,508.93x = 4,489,424,086.73
5. Step 5: Solve for x
   x = 4,489,424,086.73/76,508.93
6. Step 6: Final answer
   x = 58,678.43