Finding the Fourth Proportional to 105,559.05, 145,672.02 and 57,816.84

Step by Step Solution

1. Step 1: Write the proportion equation
   105,559.05 : 145,672.02 = 57,816.84 : x
2. Step 2: Convert to fraction form
   105,559.05/145,672.02 = 57,816.84/x
3. Step 3: Cross multiply
   105,559.05x = 145,672.02 × 57,816.84
4. Step 4: Simplify right side
   105,559.05x = 8,422,295,872.82
5. Step 5: Solve for x
   x = 8,422,295,872.82/105,559.05
6. Step 6: Final answer
   x = 79,787.53