Finding the Third Proportional to 99,814.50 and 145,854

Step by Step Solution

1. Step 1: Write the proportion equation
   99,814.50 : 145,854 = 145,854 : x
2. Step 2: Convert to fraction form
   99,814.50/145,854 = 145,854/x
3. Step 3: Cross multiply
   99,814.50x = 145,854 × 145,854
4. Step 4: Simplify right side
   99,814.50x = 21,273,389,316
5. Step 5: Solve for x
   x = 21,273,389,316/99,814.50
6. Step 6: Final answer
   x = 213,129.25