Finding the Fourth Proportional to 105,117.88, 145,061.54 and 57,370.84

Step by Step Solution

1. Step 1: Write the proportion equation
   105,117.88 : 145,061.54 = 57,370.84 : x
2. Step 2: Convert to fraction form
   105,117.88/145,061.54 = 57,370.84/x
3. Step 3: Cross multiply
   105,117.88x = 145,061.54 × 57,370.84
4. Step 4: Simplify right side
   105,117.88x = 8,322,302,401.49
5. Step 5: Solve for x
   x = 8,322,302,401.49/105,117.88
6. Step 6: Final answer
   x = 79,171.14