Finding the Fourth Proportional to 105,401.39, 145,451.70 and 57,653.10

Step by Step Solution

1. Step 1: Write the proportion equation
   105,401.39 : 145,451.70 = 57,653.10 : x
2. Step 2: Convert to fraction form
   105,401.39/145,451.70 = 57,653.10/x
3. Step 3: Cross multiply
   105,401.39x = 145,451.70 × 57,653.10
4. Step 4: Simplify right side
   105,401.39x = 8,385,741,405.27
5. Step 5: Solve for x
   x = 8,385,741,405.27/105,401.39
6. Step 6: Final answer
   x = 79,560.07