Finding the Fourth Proportional to 320,762.48, 480,981.72 and 107,456.72

Step by Step Solution

1. Step 1: Write the proportion equation
   320,762.48 : 480,981.72 = 107,456.72 : x
2. Step 2: Convert to fraction form
   320,762.48/480,981.72 = 107,456.72/x
3. Step 3: Cross multiply
   320,762.48x = 480,981.72 × 107,456.72
4. Step 4: Simplify right side
   320,762.48x = 51,684,718,011.16
5. Step 5: Solve for x
   x = 51,684,718,011.16/320,762.48
6. Step 6: Final answer
   x = 161,130.81