Finding the Fourth Proportional to 51,589.72, 77,406.45 and 28,188.82

Step by Step Solution

1. Step 1: Write the proportion equation
   51,589.72 : 77,406.45 = 28,188.82 : x
2. Step 2: Convert to fraction form
   51,589.72/77,406.45 = 28,188.82/x
3. Step 3: Cross multiply
   51,589.72x = 77,406.45 × 28,188.82
4. Step 4: Simplify right side
   51,589.72x = 2,181,996,485.89
5. Step 5: Solve for x
   x = 2,181,996,485.89/51,589.72
6. Step 6: Final answer
   x = 42,295.18