Finding the Fourth Proportional to 72,992.50, 100,729.71 and 42,771.80

Step by Step Solution

1. Step 1: Write the proportion equation
   72,992.50 : 100,729.71 = 42,771.80 : x
2. Step 2: Convert to fraction form
   72,992.50/100,729.71 = 42,771.80/x
3. Step 3: Cross multiply
   72,992.50x = 100,729.71 × 42,771.80
4. Step 4: Simplify right side
   72,992.50x = 4,308,391,262.00
5. Step 5: Solve for x
   x = 4,308,391,262.00/72,992.50
6. Step 6: Final answer
   x = 59,025.12