Finding the Fourth Proportional to 105,518.84, 145,610.24 and 57,762.95

Step by Step Solution

1. Step 1: Write the proportion equation
   105,518.84 : 145,610.24 = 57,762.95 : x
2. Step 2: Convert to fraction form
   105,518.84/145,610.24 = 57,762.95/x
3. Step 3: Cross multiply
   105,518.84x = 145,610.24 × 57,762.95
4. Step 4: Simplify right side
   105,518.84x = 8,410,877,087.82
5. Step 5: Solve for x
   x = 8,410,877,087.82/105,518.84
6. Step 6: Final answer
   x = 79,709.72