Finding the Fourth Proportional to 152,139.98, 227,911.88 and 72,021.26

Step by Step Solution

1. Step 1: Write the proportion equation
   152,139.98 : 227,911.88 = 72,021.26 : x
2. Step 2: Convert to fraction form
   152,139.98/227,911.88 = 72,021.26/x
3. Step 3: Cross multiply
   152,139.98x = 227,911.88 × 72,021.26
4. Step 4: Simplify right side
   152,139.98x = 16,414,500,766.57
5. Step 5: Solve for x
   x = 16,414,500,766.57/152,139.98
6. Step 6: Final answer
   x = 107,890.78