Finding the Fourth Proportional to 31,155, 42,992.30 and 17,005.12

Step by Step Solution

1. Step 1: Write the proportion equation
   31,155 : 42,992.30 = 17,005.12 : x
2. Step 2: Convert to fraction form
   31,155/42,992.30 = 17,005.12/x
3. Step 3: Cross multiply
   31,155x = 42,992.30 × 17,005.12
4. Step 4: Simplify right side
   31,155x = 731,089,220.58
5. Step 5: Solve for x
   x = 731,089,220.58/31,155
6. Step 6: Final answer
   x = 23,466.19