Finding the Third Proportional to 978,558 and 1,378,031.50

Step by Step Solution

1. Step 1: Write the proportion equation
   978,558 : 1,378,031.50 = 1,378,031.50 : x
2. Step 2: Convert to fraction form
   978,558/1,378,031.50 = 1,378,031.50/x
3. Step 3: Cross multiply
   978,558x = 1,378,031.50 × 1,378,031.50
4. Step 4: Simplify right side
   978,558x = 1,898,970,814,992.25
5. Step 5: Solve for x
   x = 1,898,970,814,992.25/978,558
6. Step 6: Final answer
   x = 1,940,580.75