Finding the Fourth Proportional to 76,570.65, 105,667.59 and 42,578.76

Step by Step Solution

1. Step 1: Write the proportion equation
   76,570.65 : 105,667.59 = 42,578.76 : x
2. Step 2: Convert to fraction form
   76,570.65/105,667.59 = 42,578.76/x
3. Step 3: Cross multiply
   76,570.65x = 105,667.59 × 42,578.76
4. Step 4: Simplify right side
   76,570.65x = 4,499,194,954.39
5. Step 5: Solve for x
   x = 4,499,194,954.39/76,570.65
6. Step 6: Final answer
   x = 58,758.74