Finding the Fourth Proportional to 31,065.44, 42,870.12 and 16,918.16

Step by Step Solution

1. Step 1: Write the proportion equation
   31,065.44 : 42,870.12 = 16,918.16 : x
2. Step 2: Convert to fraction form
   31,065.44/42,870.12 = 16,918.16/x
3. Step 3: Cross multiply
   31,065.44x = 42,870.12 × 16,918.16
4. Step 4: Simplify right side
   31,065.44x = 725,283,549.38
5. Step 5: Solve for x
   x = 725,283,549.38/31,065.44
6. Step 6: Final answer
   x = 23,346.96