Finding the Third Proportional to 1,399,643 and 2,099,100.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399,643 : 2,099,100.50 = 2,099,100.50 : x
2. Step 2: Convert to fraction form
   1,399,643/2,099,100.50 = 2,099,100.50/x
3. Step 3: Cross multiply
   1,399,643x = 2,099,100.50 × 2,099,100.50
4. Step 4: Simplify right side
   1,399,643x = 4,406,222,909,100.25
5. Step 5: Solve for x
   x = 4,406,222,909,100.25/1,399,643
6. Step 6: Final answer
   x = 3,148,104.84