Finding the Third Proportional to 286,485 and 607,120.50

Step by Step Solution

1. Step 1: Write the proportion equation
   286,485 : 607,120.50 = 607,120.50 : x
2. Step 2: Convert to fraction form
   286,485/607,120.50 = 607,120.50/x
3. Step 3: Cross multiply
   286,485x = 607,120.50 × 607,120.50
4. Step 4: Simplify right side
   286,485x = 368,595,301,520.25
5. Step 5: Solve for x
   x = 368,595,301,520.25/286,485
6. Step 6: Final answer
   x = 1,286,612.92