Finding the Third Proportional to 910,414.50 and 1,406,689.50

Step by Step Solution

1. Step 1: Write the proportion equation
   910,414.50 : 1,406,689.50 = 1,406,689.50 : x
2. Step 2: Convert to fraction form
   910,414.50/1,406,689.50 = 1,406,689.50/x
3. Step 3: Cross multiply
   910,414.50x = 1,406,689.50 × 1,406,689.50
4. Step 4: Simplify right side
   910,414.50x = 1,978,775,349,410.25
5. Step 5: Solve for x
   x = 1,978,775,349,410.25/910,414.50
6. Step 6: Final answer
   x = 2,173,488.39