Finding the Fourth Proportional to 31,153.34, 42,991.48 and 17,006.20

Step by Step Solution

1. Step 1: Write the proportion equation
   31,153.34 : 42,991.48 = 17,006.20 : x
2. Step 2: Convert to fraction form
   31,153.34/42,991.48 = 17,006.20/x
3. Step 3: Cross multiply
   31,153.34x = 42,991.48 × 17,006.20
4. Step 4: Simplify right side
   31,153.34x = 731,121,707.18
5. Step 5: Solve for x
   x = 731,121,707.18/31,153.34
6. Step 6: Final answer
   x = 23,468.49