Finding the Third Proportional to 148,791 and 212,689.50

Step by Step Solution

1. Step 1: Write the proportion equation
   148,791 : 212,689.50 = 212,689.50 : x
2. Step 2: Convert to fraction form
   148,791/212,689.50 = 212,689.50/x
3. Step 3: Cross multiply
   148,791x = 212,689.50 × 212,689.50
4. Step 4: Simplify right side
   148,791x = 45,236,823,410.25
5. Step 5: Solve for x
   x = 45,236,823,410.25/148,791
6. Step 6: Final answer
   x = 304,029.30