Finding the Fourth Proportional to 76,644.83, 105,771.89 and 42,655.61

Step by Step Solution

1. Step 1: Write the proportion equation
   76,644.83 : 105,771.89 = 42,655.61 : x
2. Step 2: Convert to fraction form
   76,644.83/105,771.89 = 42,655.61/x
3. Step 3: Cross multiply
   76,644.83x = 105,771.89 × 42,655.61
4. Step 4: Simplify right side
   76,644.83x = 4,511,764,275.52
5. Step 5: Solve for x
   x = 4,511,764,275.52/76,644.83
6. Step 6: Final answer
   x = 58,865.87