Finding the Third Proportional to 890,814 and 1,210,279.50

Step by Step Solution

1. Step 1: Write the proportion equation
   890,814 : 1,210,279.50 = 1,210,279.50 : x
2. Step 2: Convert to fraction form
   890,814/1,210,279.50 = 1,210,279.50/x
3. Step 3: Cross multiply
   890,814x = 1,210,279.50 × 1,210,279.50
4. Step 4: Simplify right side
   890,814x = 1,464,776,468,120.25
5. Step 5: Solve for x
   x = 1,464,776,468,120.25/890,814
6. Step 6: Final answer
   x = 1,644,312.36