Finding the Third Proportional to 550,579.50 and 740,980.50

Step by Step Solution

1. Step 1: Write the proportion equation
   550,579.50 : 740,980.50 = 740,980.50 : x
2. Step 2: Convert to fraction form
   550,579.50/740,980.50 = 740,980.50/x
3. Step 3: Cross multiply
   550,579.50x = 740,980.50 × 740,980.50
4. Step 4: Simplify right side
   550,579.50x = 549,052,101,380.25
5. Step 5: Solve for x
   x = 549,052,101,380.25/550,579.50
6. Step 6: Final answer
   x = 997,225.83