Finding the Fourth Proportional to 31,155, 42,991.89 and 17,007.84

Step by Step Solution

1. Step 1: Write the proportion equation
   31,155 : 42,991.89 = 17,007.84 : x
2. Step 2: Convert to fraction form
   31,155/42,991.89 = 17,007.84/x
3. Step 3: Cross multiply
   31,155x = 42,991.89 × 17,007.84
4. Step 4: Simplify right side
   31,155x = 731,199,186.42
5. Step 5: Solve for x
   x = 731,199,186.42/31,155
6. Step 6: Final answer
   x = 23,469.72