Finding the Fourth Proportional to 83,222.28, 124,832.34 and 20,892.78

Step by Step Solution

1. Step 1: Write the proportion equation
   83,222.28 : 124,832.34 = 20,892.78 : x
2. Step 2: Convert to fraction form
   83,222.28/124,832.34 = 20,892.78/x
3. Step 3: Cross multiply
   83,222.28x = 124,832.34 × 20,892.78
4. Step 4: Simplify right side
   83,222.28x = 2,608,094,616.51
5. Step 5: Solve for x
   x = 2,608,094,616.51/83,222.28
6. Step 6: Final answer
   x = 31,338.90