Finding the Third Proportional to 438,651 and 911,767.50

Step by Step Solution

1. Step 1: Write the proportion equation
   438,651 : 911,767.50 = 911,767.50 : x
2. Step 2: Convert to fraction form
   438,651/911,767.50 = 911,767.50/x
3. Step 3: Cross multiply
   438,651x = 911,767.50 × 911,767.50
4. Step 4: Simplify right side
   438,651x = 831,319,974,056.25
5. Step 5: Solve for x
   x = 831,319,974,056.25/438,651
6. Step 6: Final answer
   x = 1,895,174.01