Finding the Third Proportional to 1,399,599 and 1,899,139.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399,599 : 1,899,139.50 = 1,899,139.50 : x
2. Step 2: Convert to fraction form
   1,399,599/1,899,139.50 = 1,899,139.50/x
3. Step 3: Cross multiply
   1,399,599x = 1,899,139.50 × 1,899,139.50
4. Step 4: Simplify right side
   1,399,599x = 3,606,730,840,460.25
5. Step 5: Solve for x
   x = 3,606,730,840,460.25/1,399,599
6. Step 6: Final answer
   x = 2,576,974.43