Finding the Third Proportional to 684,186 and 1,038,280.50

Step by Step Solution

1. Step 1: Write the proportion equation
   684,186 : 1,038,280.50 = 1,038,280.50 : x
2. Step 2: Convert to fraction form
   684,186/1,038,280.50 = 1,038,280.50/x
3. Step 3: Cross multiply
   684,186x = 1,038,280.50 × 1,038,280.50
4. Step 4: Simplify right side
   684,186x = 1,078,026,396,680.25
5. Step 5: Solve for x
   x = 1,078,026,396,680.25/684,186
6. Step 6: Final answer
   x = 1,575,633.52