Finding the Fourth Proportional to 50,971.86, 70,338.78 and 28,312.29

Step by Step Solution

1. Step 1: Write the proportion equation
   50,971.86 : 70,338.78 = 28,312.29 : x
2. Step 2: Convert to fraction form
   50,971.86/70,338.78 = 28,312.29/x
3. Step 3: Cross multiply
   50,971.86x = 70,338.78 × 28,312.29
4. Step 4: Simplify right side
   50,971.86x = 1,991,451,937.61
5. Step 5: Solve for x
   x = 1,991,451,937.61/50,971.86
6. Step 6: Final answer
   x = 39,069.63