Finding the Third Proportional to 402,297 and 554,168.50

Step by Step Solution

1. Step 1: Write the proportion equation
   402,297 : 554,168.50 = 554,168.50 : x
2. Step 2: Convert to fraction form
   402,297/554,168.50 = 554,168.50/x
3. Step 3: Cross multiply
   402,297x = 554,168.50 × 554,168.50
4. Step 4: Simplify right side
   402,297x = 307,102,726,392.25
5. Step 5: Solve for x
   x = 307,102,726,392.25/402,297
6. Step 6: Final answer
   x = 763,373.15