Finding the Third Proportional to 402,281 and 554,145.50

Step by Step Solution

1. Step 1: Write the proportion equation
   402,281 : 554,145.50 = 554,145.50 : x
2. Step 2: Convert to fraction form
   402,281/554,145.50 = 554,145.50/x
3. Step 3: Cross multiply
   402,281x = 554,145.50 × 554,145.50
4. Step 4: Simplify right side
   402,281x = 307,077,235,170.25
5. Step 5: Solve for x
   x = 307,077,235,170.25/402,281
6. Step 6: Final answer
   x = 763,340.14