Finding the Third Proportional to 141,061.50 and 306,990

Step by Step Solution

1. Step 1: Write the proportion equation
   141,061.50 : 306,990 = 306,990 : x
2. Step 2: Convert to fraction form
   141,061.50/306,990 = 306,990/x
3. Step 3: Cross multiply
   141,061.50x = 306,990 × 306,990
4. Step 4: Simplify right side
   141,061.50x = 94,242,860,100
5. Step 5: Solve for x
   x = 94,242,860,100/141,061.50
6. Step 6: Final answer
   x = 668,097.67