Finding the Fourth Proportional to 50,720.50, 69,994.53 and 28,364.50

Step by Step Solution

1. Step 1: Write the proportion equation
   50,720.50 : 69,994.53 = 28,364.50 : x
2. Step 2: Convert to fraction form
   50,720.50/69,994.53 = 28,364.50/x
3. Step 3: Cross multiply
   50,720.50x = 69,994.53 × 28,364.50
4. Step 4: Simplify right side
   50,720.50x = 1,985,359,846.19
5. Step 5: Solve for x
   x = 1,985,359,846.19/50,720.50
6. Step 6: Final answer
   x = 39,143.14