Finding the Fourth Proportional to 50,920.84, 76,389.72 and 21,340.90

Step by Step Solution

1. Step 1: Write the proportion equation
   50,920.84 : 76,389.72 = 21,340.90 : x
2. Step 2: Convert to fraction form
   50,920.84/76,389.72 = 21,340.90/x
3. Step 3: Cross multiply
   50,920.84x = 76,389.72 × 21,340.90
4. Step 4: Simplify right side
   50,920.84x = 1,630,225,375.55
5. Step 5: Solve for x
   x = 1,630,225,375.55/50,920.84
6. Step 6: Final answer
   x = 32,014.90