Finding the Fourth Proportional to 510,938.58, 705,150.72 and 281,519.46

Step by Step Solution

1. Step 1: Write the proportion equation
   510,938.58 : 705,150.72 = 281,519.46 : x
2. Step 2: Convert to fraction form
   510,938.58/705,150.72 = 281,519.46/x
3. Step 3: Cross multiply
   510,938.58x = 705,150.72 × 281,519.46
4. Step 4: Simplify right side
   510,938.58x = 198,513,649,913.01
5. Step 5: Solve for x
   x = 198,513,649,913.01/510,938.58
6. Step 6: Final answer
   x = 388,527.42