Finding the Third Proportional to 1,257,403.50 and 1,991,916.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,257,403.50 : 1,991,916.56 = 1,991,916.56 : x
2. Step 2: Convert to fraction form
   1,257,403.50/1,991,916.56 = 1,991,916.56/x
3. Step 3: Cross multiply
   1,257,403.50x = 1,991,916.56 × 1,991,916.56
4. Step 4: Simplify right side
   1,257,403.50x = 3,967,731,591,961.82
5. Step 5: Solve for x
   x = 3,967,731,591,961.82/1,257,403.50
6. Step 6: Final answer
   x = 3,155,495.90