Finding the Fourth Proportional to 82,978.06, 124,467.12 and 20,648.56

Step by Step Solution

1. Step 1: Write the proportion equation
   82,978.06 : 124,467.12 = 20,648.56 : x
2. Step 2: Convert to fraction form
   82,978.06/124,467.12 = 20,648.56/x
3. Step 3: Cross multiply
   82,978.06x = 124,467.12 × 20,648.56
4. Step 4: Simplify right side
   82,978.06x = 2,570,066,795.35
5. Step 5: Solve for x
   x = 2,570,066,795.35/82,978.06
6. Step 6: Final answer
   x = 30,972.85