Finding the Third Proportional to 147,766.78 and 215,191.69

Step by Step Solution

1. Step 1: Write the proportion equation
   147,766.78 : 215,191.69 = 215,191.69 : x
2. Step 2: Convert to fraction form
   147,766.78/215,191.69 = 215,191.69/x
3. Step 3: Cross multiply
   147,766.78x = 215,191.69 × 215,191.69
4. Step 4: Simplify right side
   147,766.78x = 46,307,462,369.10
5. Step 5: Solve for x
   x = 46,307,462,369.10/147,766.78
6. Step 6: Final answer
   x = 313,382.09