Finding the Fourth Proportional to 321,127.50, 443,155.96 and 193,803.10

Step by Step Solution

1. Step 1: Write the proportion equation
   321,127.50 : 443,155.96 = 193,803.10 : x
2. Step 2: Convert to fraction form
   321,127.50/443,155.96 = 193,803.10/x
3. Step 3: Cross multiply
   321,127.50x = 443,155.96 × 193,803.10
4. Step 4: Simplify right side
   321,127.50x = 85,884,998,831.48
5. Step 5: Solve for x
   x = 85,884,998,831.48/321,127.50
6. Step 6: Final answer
   x = 267,448.28