Finding the Fourth Proportional to 31,017.36, 42,802.72 and 16,870.22

Step by Step Solution

1. Step 1: Write the proportion equation
   31,017.36 : 42,802.72 = 16,870.22 : x
2. Step 2: Convert to fraction form
   31,017.36/42,802.72 = 16,870.22/x
3. Step 3: Cross multiply
   31,017.36x = 42,802.72 × 16,870.22
4. Step 4: Simplify right side
   31,017.36x = 722,091,303.00
5. Step 5: Solve for x
   x = 722,091,303.00/31,017.36
6. Step 6: Final answer
   x = 23,280.23