Finding the Third Proportional to 141,199.50 and 310,830

Step by Step Solution

1. Step 1: Write the proportion equation
   141,199.50 : 310,830 = 310,830 : x
2. Step 2: Convert to fraction form
   141,199.50/310,830 = 310,830/x
3. Step 3: Cross multiply
   141,199.50x = 310,830 × 310,830
4. Step 4: Simplify right side
   141,199.50x = 96,615,288,900
5. Step 5: Solve for x
   x = 96,615,288,900/141,199.50
6. Step 6: Final answer
   x = 684,246.68