Finding the Third Proportional to 89,931 and 139,725

Step by Step Solution

1. Step 1: Write the proportion equation
   89,931 : 139,725 = 139,725 : x
2. Step 2: Convert to fraction form
   89,931/139,725 = 139,725/x
3. Step 3: Cross multiply
   89,931x = 139,725 × 139,725
4. Step 4: Simplify right side
   89,931x = 19,523,075,625
5. Step 5: Solve for x
   x = 19,523,075,625/89,931
6. Step 6: Final answer
   x = 217,089.50