Finding the Fourth Proportional to 359,173, 538,762.20 and 159,439.69

Step by Step Solution

1. Step 1: Write the proportion equation
   359,173 : 538,762.20 = 159,439.69 : x
2. Step 2: Convert to fraction form
   359,173/538,762.20 = 159,439.69/x
3. Step 3: Cross multiply
   359,173x = 538,762.20 × 159,439.69
4. Step 4: Simplify right side
   359,173x = 85,900,078,151.72
5. Step 5: Solve for x
   x = 85,900,078,151.72/359,173
6. Step 6: Final answer
   x = 239,160.73