Finding the Fourth Proportional to 381,978.99, 572,771.39 and 171,436.77

Step by Step Solution

1. Step 1: Write the proportion equation
   381,978.99 : 572,771.39 = 171,436.77 : x
2. Step 2: Convert to fraction form
   381,978.99/572,771.39 = 171,436.77/x
3. Step 3: Cross multiply
   381,978.99x = 572,771.39 × 171,436.77
4. Step 4: Simplify right side
   381,978.99x = 98,194,076,192.83
5. Step 5: Solve for x
   x = 98,194,076,192.83/381,978.99
6. Step 6: Final answer
   x = 257,066.69