Finding the Fourth Proportional to 43,978.35, 65,986.21 and 21,792.15

Step by Step Solution

1. Step 1: Write the proportion equation
   43,978.35 : 65,986.21 = 21,792.15 : x
2. Step 2: Convert to fraction form
   43,978.35/65,986.21 = 21,792.15/x
3. Step 3: Cross multiply
   43,978.35x = 65,986.21 × 21,792.15
4. Step 4: Simplify right side
   43,978.35x = 1,437,981,043.46
5. Step 5: Solve for x
   x = 1,437,981,043.46/43,978.35
6. Step 6: Final answer
   x = 32,697.48