Finding the Third Proportional to 99,144 and 216,090.28

Step by Step Solution

1. Step 1: Write the proportion equation
   99,144 : 216,090.28 = 216,090.28 : x
2. Step 2: Convert to fraction form
   99,144/216,090.28 = 216,090.28/x
3. Step 3: Cross multiply
   99,144x = 216,090.28 × 216,090.28
4. Step 4: Simplify right side
   99,144x = 46,695,009,650.70
5. Step 5: Solve for x
   x = 46,695,009,650.70/99,144
6. Step 6: Final answer
   x = 470,981.70