Finding the Fourth Proportional to 105,401.82, 145,454.56 and 57,655.05

Step by Step Solution

1. Step 1: Write the proportion equation
   105,401.82 : 145,454.56 = 57,655.05 : x
2. Step 2: Convert to fraction form
   105,401.82/145,454.56 = 57,655.05/x
3. Step 3: Cross multiply
   105,401.82x = 145,454.56 × 57,655.05
4. Step 4: Simplify right side
   105,401.82x = 8,386,189,929.53
5. Step 5: Solve for x
   x = 8,386,189,929.53/105,401.82
6. Step 6: Final answer
   x = 79,564.00