Finding the Fourth Proportional to 320,426.77, 480,667.47 and 83,769.07

Step by Step Solution

1. Step 1: Write the proportion equation
   320,426.77 : 480,667.47 = 83,769.07 : x
2. Step 2: Convert to fraction form
   320,426.77/480,667.47 = 83,769.07/x
3. Step 3: Cross multiply
   320,426.77x = 480,667.47 × 83,769.07
4. Step 4: Simplify right side
   320,426.77x = 40,265,066,941.15
5. Step 5: Solve for x
   x = 40,265,066,941.15/320,426.77
6. Step 6: Final answer
   x = 125,660.75