Finding the Fourth Proportional to 51,990.89, 71,774.98 and 40,028.00

Step by Step Solution

1. Step 1: Write the proportion equation
   51,990.89 : 71,774.98 = 40,028.00 : x
2. Step 2: Convert to fraction form
   51,990.89/71,774.98 = 40,028.00/x
3. Step 3: Cross multiply
   51,990.89x = 71,774.98 × 40,028.00
4. Step 4: Simplify right side
   51,990.89x = 2,873,008,440.50
5. Step 5: Solve for x
   x = 2,873,008,440.50/51,990.89
6. Step 6: Final answer
   x = 55,259.85