Finding the Fourth Proportional to 51,756.84, 77,665.37 and 21,768.89

Step by Step Solution

1. Step 1: Write the proportion equation
   51,756.84 : 77,665.37 = 21,768.89 : x
2. Step 2: Convert to fraction form
   51,756.84/77,665.37 = 21,768.89/x
3. Step 3: Cross multiply
   51,756.84x = 77,665.37 × 21,768.89
4. Step 4: Simplify right side
   51,756.84x = 1,690,688,399.17
5. Step 5: Solve for x
   x = 1,690,688,399.17/51,756.84
6. Step 6: Final answer
   x = 32,665.99