Finding the Third Proportional to 12,985.31 and 16,880.91

Step by Step Solution

1. Step 1: Write the proportion equation
   12,985.31 : 16,880.91 = 16,880.91 : x
2. Step 2: Convert to fraction form
   12,985.31/16,880.91 = 16,880.91/x
3. Step 3: Cross multiply
   12,985.31x = 16,880.91 × 16,880.91
4. Step 4: Simplify right side
   12,985.31x = 284,964,995.82
5. Step 5: Solve for x
   x = 284,964,995.82/12,985.31
6. Step 6: Final answer
   x = 21,945.18