Finding the Fourth Proportional to 31,065.19, 42,870.02 and 16,918.09

Step by Step Solution

1. Step 1: Write the proportion equation
   31,065.19 : 42,870.02 = 16,918.09 : x
2. Step 2: Convert to fraction form
   31,065.19/42,870.02 = 16,918.09/x
3. Step 3: Cross multiply
   31,065.19x = 42,870.02 × 16,918.09
4. Step 4: Simplify right side
   31,065.19x = 725,278,856.66
5. Step 5: Solve for x
   x = 725,278,856.66/31,065.19
6. Step 6: Final answer
   x = 23,347.00