Finding the Third Proportional to 315,495 and 684,221.63

Step by Step Solution

1. Step 1: Write the proportion equation
   315,495 : 684,221.63 = 684,221.63 : x
2. Step 2: Convert to fraction form
   315,495/684,221.63 = 684,221.63/x
3. Step 3: Cross multiply
   315,495x = 684,221.63 × 684,221.63
4. Step 4: Simplify right side
   315,495x = 468,159,232,117.64
5. Step 5: Solve for x
   x = 468,159,232,117.64/315,495
6. Step 6: Final answer
   x = 1,483,887.96