Finding the Third Proportional to 218,143 and 456,151

Step by Step Solution

1. Step 1: Write the proportion equation
   218,143 : 456,151 = 456,151 : x
2. Step 2: Convert to fraction form
   218,143/456,151 = 456,151/x
3. Step 3: Cross multiply
   218,143x = 456,151 × 456,151
4. Step 4: Simplify right side
   218,143x = 208,073,734,801
5. Step 5: Solve for x
   x = 208,073,734,801/218,143
6. Step 6: Final answer
   x = 953,840.99