Finding the Fourth Proportional to 76,831.83, 115,247.34 and 20,667.37

Step by Step Solution

1. Step 1: Write the proportion equation
   76,831.83 : 115,247.34 = 20,667.37 : x
2. Step 2: Convert to fraction form
   76,831.83/115,247.34 = 20,667.37/x
3. Step 3: Cross multiply
   76,831.83x = 115,247.34 × 20,667.37
4. Step 4: Simplify right side
   76,831.83x = 2,381,859,129.18
5. Step 5: Solve for x
   x = 2,381,859,129.18/76,831.83
6. Step 6: Final answer
   x = 31,000.94