Finding the Third Proportional to 99,144 and 216,148.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,144 : 216,148.50 = 216,148.50 : x
2. Step 2: Convert to fraction form
   99,144/216,148.50 = 216,148.50/x
3. Step 3: Cross multiply
   99,144x = 216,148.50 × 216,148.50
4. Step 4: Simplify right side
   99,144x = 46,720,174,052.25
5. Step 5: Solve for x
   x = 46,720,174,052.25/99,144
6. Step 6: Final answer
   x = 471,235.52