Finding the Fourth Proportional to 105,301.12, 145,311.18 and 57,556.12

Step by Step Solution

1. Step 1: Write the proportion equation
   105,301.12 : 145,311.18 = 57,556.12 : x
2. Step 2: Convert to fraction form
   105,301.12/145,311.18 = 57,556.12/x
3. Step 3: Cross multiply
   105,301.12x = 145,311.18 × 57,556.12
4. Step 4: Simplify right side
   105,301.12x = 8,363,547,713.42
5. Step 5: Solve for x
   x = 8,363,547,713.42/105,301.12
6. Step 6: Final answer
   x = 79,425.06