Finding the Third Proportional to 31,424.63 and 68,385.09

Step by Step Solution

1. Step 1: Write the proportion equation
   31,424.63 : 68,385.09 = 68,385.09 : x
2. Step 2: Convert to fraction form
   31,424.63/68,385.09 = 68,385.09/x
3. Step 3: Cross multiply
   31,424.63x = 68,385.09 × 68,385.09
4. Step 4: Simplify right side
   31,424.63x = 4,676,521,047.20
5. Step 5: Solve for x
   x = 4,676,521,047.20/31,424.63
6. Step 6: Final answer
   x = 148,817.08