Finding the Third Proportional to 149,329.50 and 316,146

Step by Step Solution

1. Step 1: Write the proportion equation
   149,329.50 : 316,146 = 316,146 : x
2. Step 2: Convert to fraction form
   149,329.50/316,146 = 316,146/x
3. Step 3: Cross multiply
   149,329.50x = 316,146 × 316,146
4. Step 4: Simplify right side
   149,329.50x = 99,948,293,316
5. Step 5: Solve for x
   x = 99,948,293,316/149,329.50
6. Step 6: Final answer
   x = 669,313.79