Finding the Fourth Proportional to 318,404.79, 477,222.71 and 140,710.23

Step by Step Solution

1. Step 1: Write the proportion equation
   318,404.79 : 477,222.71 = 140,710.23 : x
2. Step 2: Convert to fraction form
   318,404.79/477,222.71 = 140,710.23/x
3. Step 3: Cross multiply
   318,404.79x = 477,222.71 × 140,710.23
4. Step 4: Simplify right side
   318,404.79x = 67,150,116,581.77
5. Step 5: Solve for x
   x = 67,150,116,581.77/318,404.79
6. Step 6: Final answer
   x = 210,895.43