Finding the Fourth Proportional to 31,118.16, 42,941.76 and 16,970.16

Step by Step Solution

1. Step 1: Write the proportion equation
   31,118.16 : 42,941.76 = 16,970.16 : x
2. Step 2: Convert to fraction form
   31,118.16/42,941.76 = 16,970.16/x
3. Step 3: Cross multiply
   31,118.16x = 42,941.76 × 16,970.16
4. Step 4: Simplify right side
   31,118.16x = 728,728,537.88
5. Step 5: Solve for x
   x = 728,728,537.88/31,118.16
6. Step 6: Final answer
   x = 23,418.11