Finding the Fourth Proportional to 50,978.30, 76,481.18 and 21,388.19

Step by Step Solution

1. Step 1: Write the proportion equation
   50,978.30 : 76,481.18 = 21,388.19 : x
2. Step 2: Convert to fraction form
   50,978.30/76,481.18 = 21,388.19/x
3. Step 3: Cross multiply
   50,978.30x = 76,481.18 × 21,388.19
4. Step 4: Simplify right side
   50,978.30x = 1,635,793,600.12
5. Step 5: Solve for x
   x = 1,635,793,600.12/50,978.30
6. Step 6: Final answer
   x = 32,088.04