Finding the Fourth Proportional to 105,074.62, 157,401.37 and 99,555.46

Step by Step Solution

1. Step 1: Write the proportion equation
   105,074.62 : 157,401.37 = 99,555.46 : x
2. Step 2: Convert to fraction form
   105,074.62/157,401.37 = 99,555.46/x
3. Step 3: Cross multiply
   105,074.62x = 157,401.37 × 99,555.46
4. Step 4: Simplify right side
   105,074.62x = 15,670,164,510.20
5. Step 5: Solve for x
   x = 15,670,164,510.20/105,074.62
6. Step 6: Final answer
   x = 149,133.68