Finding the Fourth Proportional to 52,326.57, 72,216.72 and 31,105.65

Step by Step Solution

1. Step 1: Write the proportion equation
   52,326.57 : 72,216.72 = 31,105.65 : x
2. Step 2: Convert to fraction form
   52,326.57/72,216.72 = 31,105.65/x
3. Step 3: Cross multiply
   52,326.57x = 72,216.72 × 31,105.65
4. Step 4: Simplify right side
   52,326.57x = 2,246,348,016.47
5. Step 5: Solve for x
   x = 2,246,348,016.47/52,326.57
6. Step 6: Final answer
   x = 42,929.40