Finding the Fourth Proportional to 39,873.74, 55,025.50 and 21,968.34

Step by Step Solution

1. Step 1: Write the proportion equation
   39,873.74 : 55,025.50 = 21,968.34 : x
2. Step 2: Convert to fraction form
   39,873.74/55,025.50 = 21,968.34/x
3. Step 3: Cross multiply
   39,873.74x = 55,025.50 × 21,968.34
4. Step 4: Simplify right side
   39,873.74x = 1,208,818,892.67
5. Step 5: Solve for x
   x = 1,208,818,892.67/39,873.74
6. Step 6: Final answer
   x = 30,316.17