Finding the Fourth Proportional to 31,156.20, 42,995.70 and 17,009.37

Step by Step Solution

1. Step 1: Write the proportion equation
   31,156.20 : 42,995.70 = 17,009.37 : x
2. Step 2: Convert to fraction form
   31,156.20/42,995.70 = 17,009.37/x
3. Step 3: Cross multiply
   31,156.20x = 42,995.70 × 17,009.37
4. Step 4: Simplify right side
   31,156.20x = 731,329,769.71
5. Step 5: Solve for x
   x = 731,329,769.71/31,156.20
6. Step 6: Final answer
   x = 23,473.01