Finding the Third Proportional to 359,931.38 and 787,658.63

Step by Step Solution

1. Step 1: Write the proportion equation
   359,931.38 : 787,658.63 = 787,658.63 : x
2. Step 2: Convert to fraction form
   359,931.38/787,658.63 = 787,658.63/x
3. Step 3: Cross multiply
   359,931.38x = 787,658.63 × 787,658.63
4. Step 4: Simplify right side
   359,931.38x = 620,406,109,536.89
5. Step 5: Solve for x
   x = 620,406,109,536.89/359,931.38
6. Step 6: Final answer
   x = 1,723,678.88