Finding the Fourth Proportional to 76,601.31, 105,708.30 and 42,608.64

Step by Step Solution

1. Step 1: Write the proportion equation
   76,601.31 : 105,708.30 = 42,608.64 : x
2. Step 2: Convert to fraction form
   76,601.31/105,708.30 = 42,608.64/x
3. Step 3: Cross multiply
   76,601.31x = 105,708.30 × 42,608.64
4. Step 4: Simplify right side
   76,601.31x = 4,504,086,899.71
5. Step 5: Solve for x
   x = 4,504,086,899.71/76,601.31
6. Step 6: Final answer
   x = 58,799.08