Finding the Third Proportional to 260,979 and 556,138.50

Step by Step Solution

1. Step 1: Write the proportion equation
   260,979 : 556,138.50 = 556,138.50 : x
2. Step 2: Convert to fraction form
   260,979/556,138.50 = 556,138.50/x
3. Step 3: Cross multiply
   260,979x = 556,138.50 × 556,138.50
4. Step 4: Simplify right side
   260,979x = 309,290,031,182.25
5. Step 5: Solve for x
   x = 309,290,031,182.25/260,979
6. Step 6: Final answer
   x = 1,185,114.63