Finding the Third Proportional to 31,672.88 and 68,858.63

Step by Step Solution

1. Step 1: Write the proportion equation
   31,672.88 : 68,858.63 = 68,858.63 : x
2. Step 2: Convert to fraction form
   31,672.88/68,858.63 = 68,858.63/x
3. Step 3: Cross multiply
   31,672.88x = 68,858.63 × 68,858.63
4. Step 4: Simplify right side
   31,672.88x = 4,741,510,236.89
5. Step 5: Solve for x
   x = 4,741,510,236.89/31,672.88
6. Step 6: Final answer
   x = 149,702.55