Finding the Fourth Proportional to 105,553.88, 145,664.82 and 57,807.56

Step by Step Solution

1. Step 1: Write the proportion equation
   105,553.88 : 145,664.82 = 57,807.56 : x
2. Step 2: Convert to fraction form
   105,553.88/145,664.82 = 57,807.56/x
3. Step 3: Cross multiply
   105,553.88x = 145,664.82 × 57,807.56
4. Step 4: Simplify right side
   105,553.88x = 8,420,527,822.04
5. Step 5: Solve for x
   x = 8,420,527,822.04/105,553.88
6. Step 6: Final answer
   x = 79,774.69