Finding the Fourth Proportional to 320,760.48, 480,978.72 and 107,454.72

Step by Step Solution

1. Step 1: Write the proportion equation
   320,760.48 : 480,978.72 = 107,454.72 : x
2. Step 2: Convert to fraction form
   320,760.48/480,978.72 = 107,454.72/x
3. Step 3: Cross multiply
   320,760.48x = 480,978.72 × 107,454.72
4. Step 4: Simplify right side
   320,760.48x = 51,683,433,683.56
5. Step 5: Solve for x
   x = 51,683,433,683.56/320,760.48
6. Step 6: Final answer
   x = 161,127.81