Finding the Fourth Proportional to 52,293.39, 72,165.09 and 31,072.20

Step by Step Solution

1. Step 1: Write the proportion equation
   52,293.39 : 72,165.09 = 31,072.20 : x
2. Step 2: Convert to fraction form
   52,293.39/72,165.09 = 31,072.20/x
3. Step 3: Cross multiply
   52,293.39x = 72,165.09 × 31,072.20
4. Step 4: Simplify right side
   52,293.39x = 2,242,328,109.50
5. Step 5: Solve for x
   x = 2,242,328,109.50/52,293.39
6. Step 6: Final answer
   x = 42,879.76