Finding the Fourth Proportional to 76,502.09, 105,570.79 and 42,509.71

Step by Step Solution

1. Step 1: Write the proportion equation
   76,502.09 : 105,570.79 = 42,509.71 : x
2. Step 2: Convert to fraction form
   76,502.09/105,570.79 = 42,509.71/x
3. Step 3: Cross multiply
   76,502.09x = 105,570.79 × 42,509.71
4. Step 4: Simplify right side
   76,502.09x = 4,487,783,667.37
5. Step 5: Solve for x
   x = 4,487,783,667.37/76,502.09
6. Step 6: Final answer
   x = 58,662.24