Finding the Third Proportional to 100,404.56 and 217,340.72

Step by Step Solution

1. Step 1: Write the proportion equation
   100,404.56 : 217,340.72 = 217,340.72 : x
2. Step 2: Convert to fraction form
   100,404.56/217,340.72 = 217,340.72/x
3. Step 3: Cross multiply
   100,404.56x = 217,340.72 × 217,340.72
4. Step 4: Simplify right side
   100,404.56x = 47,236,988,026.77
5. Step 5: Solve for x
   x = 47,236,988,026.77/100,404.56
6. Step 6: Final answer
   x = 470,466.55