Finding the Fourth Proportional to 105,285.48, 145,303.98 and 57,546.01

Step by Step Solution

1. Step 1: Write the proportion equation
   105,285.48 : 145,303.98 = 57,546.01 : x
2. Step 2: Convert to fraction form
   105,285.48/145,303.98 = 57,546.01/x
3. Step 3: Cross multiply
   105,285.48x = 145,303.98 × 57,546.01
4. Step 4: Simplify right side
   105,285.48x = 8,361,663,758.31
5. Step 5: Solve for x
   x = 8,361,663,758.31/105,285.48
6. Step 6: Final answer
   x = 79,418.96