Finding the Third Proportional to 1,291,390.50 and 2,815,300.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,291,390.50 : 2,815,300.50 = 2,815,300.50 : x
2. Step 2: Convert to fraction form
   1,291,390.50/2,815,300.50 = 2,815,300.50/x
3. Step 3: Cross multiply
   1,291,390.50x = 2,815,300.50 × 2,815,300.50
4. Step 4: Simplify right side
   1,291,390.50x = 7,925,916,905,300.25
5. Step 5: Solve for x
   x = 7,925,916,905,300.25/1,291,390.50
6. Step 6: Final answer
   x = 6,137,505.97