Finding the Fourth Proportional to 83,112.96, 124,667.46 and 20,783.40

Step by Step Solution

1. Step 1: Write the proportion equation
   83,112.96 : 124,667.46 = 20,783.40 : x
2. Step 2: Convert to fraction form
   83,112.96/124,667.46 = 20,783.40/x
3. Step 3: Cross multiply
   83,112.96x = 124,667.46 × 20,783.40
4. Step 4: Simplify right side
   83,112.96x = 2,591,013,688.16
5. Step 5: Solve for x
   x = 2,591,013,688.16/83,112.96
6. Step 6: Final answer
   x = 31,174.60