Finding the Fourth Proportional to 31,018.08, 42,804.48 and 16,870.60

Step by Step Solution

1. Step 1: Write the proportion equation
   31,018.08 : 42,804.48 = 16,870.60 : x
2. Step 2: Convert to fraction form
   31,018.08/42,804.48 = 16,870.60/x
3. Step 3: Cross multiply
   31,018.08x = 42,804.48 × 16,870.60
4. Step 4: Simplify right side
   31,018.08x = 722,137,260.29
5. Step 5: Solve for x
   x = 722,137,260.29/31,018.08
6. Step 6: Final answer
   x = 23,281.17