Finding the Third Proportional to 621,031.50 and 911,101.50

Step by Step Solution

1. Step 1: Write the proportion equation
   621,031.50 : 911,101.50 = 911,101.50 : x
2. Step 2: Convert to fraction form
   621,031.50/911,101.50 = 911,101.50/x
3. Step 3: Cross multiply
   621,031.50x = 911,101.50 × 911,101.50
4. Step 4: Simplify right side
   621,031.50x = 830,105,943,302.25
5. Step 5: Solve for x
   x = 830,105,943,302.25/621,031.50
6. Step 6: Final answer
   x = 1,336,656.74