Finding the Fourth Proportional to 76,575.85, 105,666.58 and 42,578.85

Step by Step Solution

1. Step 1: Write the proportion equation
   76,575.85 : 105,666.58 = 42,578.85 : x
2. Step 2: Convert to fraction form
   76,575.85/105,666.58 = 42,578.85/x
3. Step 3: Cross multiply
   76,575.85x = 105,666.58 × 42,578.85
4. Step 4: Simplify right side
   76,575.85x = 4,499,161,459.83
5. Step 5: Solve for x
   x = 4,499,161,459.83/76,575.85
6. Step 6: Final answer
   x = 58,754.31