Finding the Third Proportional to 69,903 and 89,788.50

Step by Step Solution

1. Step 1: Write the proportion equation
   69,903 : 89,788.50 = 89,788.50 : x
2. Step 2: Convert to fraction form
   69,903/89,788.50 = 89,788.50/x
3. Step 3: Cross multiply
   69,903x = 89,788.50 × 89,788.50
4. Step 4: Simplify right side
   69,903x = 8,061,974,732.25
5. Step 5: Solve for x
   x = 8,061,974,732.25/69,903
6. Step 6: Final answer
   x = 115,330.88