Finding the Fourth Proportional to 50,105.90, 69,129.32 and 28,884.72

Step by Step Solution

1. Step 1: Write the proportion equation
   50,105.90 : 69,129.32 = 28,884.72 : x
2. Step 2: Convert to fraction form
   50,105.90/69,129.32 = 28,884.72/x
3. Step 3: Cross multiply
   50,105.90x = 69,129.32 × 28,884.72
4. Step 4: Simplify right side
   50,105.90x = 1,996,781,051.99
5. Step 5: Solve for x
   x = 1,996,781,051.99/50,105.90
6. Step 6: Final answer
   x = 39,851.22