Finding the Fourth Proportional to 50,128.84, 69,176.10 and 28,907.56

Step by Step Solution

1. Step 1: Write the proportion equation
   50,128.84 : 69,176.10 = 28,907.56 : x
2. Step 2: Convert to fraction form
   50,128.84/69,176.10 = 28,907.56/x
3. Step 3: Cross multiply
   50,128.84x = 69,176.10 × 28,907.56
4. Step 4: Simplify right side
   50,128.84x = 1,999,712,261.32
5. Step 5: Solve for x
   x = 1,999,712,261.32/50,128.84
6. Step 6: Final answer
   x = 39,891.45