Finding the Third Proportional to 99,748.13 and 216,451.69

Step by Step Solution

1. Step 1: Write the proportion equation
   99,748.13 : 216,451.69 = 216,451.69 : x
2. Step 2: Convert to fraction form
   99,748.13/216,451.69 = 216,451.69/x
3. Step 3: Cross multiply
   99,748.13x = 216,451.69 × 216,451.69
4. Step 4: Simplify right side
   99,748.13x = 46,851,333,021.60
5. Step 5: Solve for x
   x = 46,851,333,021.60/99,748.13
6. Step 6: Final answer
   x = 469,696.38