Finding the Third Proportional to 31,776 and 69,900

Step by Step Solution

1. Step 1: Write the proportion equation
   31,776 : 69,900 = 69,900 : x
2. Step 2: Convert to fraction form
   31,776/69,900 = 69,900/x
3. Step 3: Cross multiply
   31,776x = 69,900 × 69,900
4. Step 4: Simplify right side
   31,776x = 4,886,010,000
5. Step 5: Solve for x
   x = 4,886,010,000/31,776
6. Step 6: Final answer
   x = 153,764.16