Finding the Fourth Proportional to 70,301.57, 105,487.72 and 28,211.73

Step by Step Solution

1. Step 1: Write the proportion equation
   70,301.57 : 105,487.72 = 28,211.73 : x
2. Step 2: Convert to fraction form
   70,301.57/105,487.72 = 28,211.73/x
3. Step 3: Cross multiply
   70,301.57x = 105,487.72 × 28,211.73
4. Step 4: Simplify right side
   70,301.57x = 2,975,991,074.96
5. Step 5: Solve for x
   x = 2,975,991,074.96/70,301.57
6. Step 6: Final answer
   x = 42,331.79