Finding the Fourth Proportional to 105,304.74, 145,315.48 and 57,558.10

Step by Step Solution

1. Step 1: Write the proportion equation
   105,304.74 : 145,315.48 = 57,558.10 : x
2. Step 2: Convert to fraction form
   105,304.74/145,315.48 = 57,558.10/x
3. Step 3: Cross multiply
   105,304.74x = 145,315.48 × 57,558.10
4. Step 4: Simplify right side
   105,304.74x = 8,364,082,929.39
5. Step 5: Solve for x
   x = 8,364,082,929.39/105,304.74
6. Step 6: Final answer
   x = 79,427.41