Finding the Third Proportional to 451,279.50 and 991,120.50

Step by Step Solution

1. Step 1: Write the proportion equation
   451,279.50 : 991,120.50 = 991,120.50 : x
2. Step 2: Convert to fraction form
   451,279.50/991,120.50 = 991,120.50/x
3. Step 3: Cross multiply
   451,279.50x = 991,120.50 × 991,120.50
4. Step 4: Simplify right side
   451,279.50x = 982,319,845,520.25
5. Step 5: Solve for x
   x = 982,319,845,520.25/451,279.50
6. Step 6: Final answer
   x = 2,176,743.78