Finding the Third Proportional to 342,115.50 and 492,807

Step by Step Solution

1. Step 1: Write the proportion equation
   342,115.50 : 492,807 = 492,807 : x
2. Step 2: Convert to fraction form
   342,115.50/492,807 = 492,807/x
3. Step 3: Cross multiply
   342,115.50x = 492,807 × 492,807
4. Step 4: Simplify right side
   342,115.50x = 242,858,739,249
5. Step 5: Solve for x
   x = 242,858,739,249/342,115.50
6. Step 6: Final answer
   x = 709,873.53