Finding the Fourth Proportional to 76,574.25, 105,672.33 and 42,581.79

Step by Step Solution

1. Step 1: Write the proportion equation
   76,574.25 : 105,672.33 = 42,581.79 : x
2. Step 2: Convert to fraction form
   76,574.25/105,672.33 = 42,581.79/x
3. Step 3: Cross multiply
   76,574.25x = 105,672.33 × 42,581.79
4. Step 4: Simplify right side
   76,574.25x = 4,499,716,964.87
5. Step 5: Solve for x
   x = 4,499,716,964.87/76,574.25
6. Step 6: Final answer
   x = 58,762.80