Finding the Fourth Proportional to 51,300.45, 76,932.18 and 21,720.33

Step by Step Solution

1. Step 1: Write the proportion equation
   51,300.45 : 76,932.18 = 21,720.33 : x
2. Step 2: Convert to fraction form
   51,300.45/76,932.18 = 21,720.33/x
3. Step 3: Cross multiply
   51,300.45x = 76,932.18 × 21,720.33
4. Step 4: Simplify right side
   51,300.45x = 1,670,992,337.22
5. Step 5: Solve for x
   x = 1,670,992,337.22/51,300.45
6. Step 6: Final answer
   x = 32,572.66