Finding the Fourth Proportional to 50,978.25, 76,452.80 and 21,402.72

Step by Step Solution

1. Step 1: Write the proportion equation
   50,978.25 : 76,452.80 = 21,402.72 : x
2. Step 2: Convert to fraction form
   50,978.25/76,452.80 = 21,402.72/x
3. Step 3: Cross multiply
   50,978.25x = 76,452.80 × 21,402.72
4. Step 4: Simplify right side
   50,978.25x = 1,636,297,764.60
5. Step 5: Solve for x
   x = 1,636,297,764.60/50,978.25
6. Step 6: Final answer
   x = 32,097.96