Finding the Third Proportional to 31,918.50 and 69,435

Step by Step Solution

1. Step 1: Write the proportion equation
   31,918.50 : 69,435 = 69,435 : x
2. Step 2: Convert to fraction form
   31,918.50/69,435 = 69,435/x
3. Step 3: Cross multiply
   31,918.50x = 69,435 × 69,435
4. Step 4: Simplify right side
   31,918.50x = 4,821,219,225
5. Step 5: Solve for x
   x = 4,821,219,225/31,918.50
6. Step 6: Final answer
   x = 151,047.80