Finding the Fourth Proportional to 50,987.39, 76,492.01 and 21,388.16

Step by Step Solution

1. Step 1: Write the proportion equation
   50,987.39 : 76,492.01 = 21,388.16 : x
2. Step 2: Convert to fraction form
   50,987.39/76,492.01 = 21,388.16/x
3. Step 3: Cross multiply
   50,987.39x = 76,492.01 × 21,388.16
4. Step 4: Simplify right side
   50,987.39x = 1,636,023,593.30
5. Step 5: Solve for x
   x = 1,636,023,593.30/50,987.39
6. Step 6: Final answer
   x = 32,086.83