Finding the Fourth Proportional to 281,401.61, 388,372.91 and 172,571.00

Step by Step Solution

1. Step 1: Write the proportion equation
   281,401.61 : 388,372.91 = 172,571.00 : x
2. Step 2: Convert to fraction form
   281,401.61/388,372.91 = 172,571.00/x
3. Step 3: Cross multiply
   281,401.61x = 388,372.91 × 172,571.00
4. Step 4: Simplify right side
   281,401.61x = 67,021,898,646.89
5. Step 5: Solve for x
   x = 67,021,898,646.89/281,401.61
6. Step 6: Final answer
   x = 238,171.70