Finding the Fourth Proportional to 105,570.76, 145,687.67 and 57,825.82

Step by Step Solution

1. Step 1: Write the proportion equation
   105,570.76 : 145,687.67 = 57,825.82 : x
2. Step 2: Convert to fraction form
   105,570.76/145,687.67 = 57,825.82/x
3. Step 3: Cross multiply
   105,570.76x = 145,687.67 × 57,825.82
4. Step 4: Simplify right side
   105,570.76x = 8,424,508,981.64
5. Step 5: Solve for x
   x = 8,424,508,981.64/105,570.76
6. Step 6: Final answer
   x = 79,799.64