Finding the Fourth Proportional to 31,071.06, 42,878.16 and 18,495

Step by Step Solution

1. Step 1: Write the proportion equation
   31,071.06 : 42,878.16 = 18,495 : x
2. Step 2: Convert to fraction form
   31,071.06/42,878.16 = 18,495/x
3. Step 3: Cross multiply
   31,071.06x = 42,878.16 × 18,495
4. Step 4: Simplify right side
   31,071.06x = 793,031,569.20
5. Step 5: Solve for x
   x = 793,031,569.20/31,071.06
6. Step 6: Final answer
   x = 25,523.16