Finding the Third Proportional to 621,478.50 and 1,353,670.50

Step by Step Solution

1. Step 1: Write the proportion equation
   621,478.50 : 1,353,670.50 = 1,353,670.50 : x
2. Step 2: Convert to fraction form
   621,478.50/1,353,670.50 = 1,353,670.50/x
3. Step 3: Cross multiply
   621,478.50x = 1,353,670.50 × 1,353,670.50
4. Step 4: Simplify right side
   621,478.50x = 1,832,423,822,570.25
5. Step 5: Solve for x
   x = 1,832,423,822,570.25/621,478.50
6. Step 6: Final answer
   x = 2,948,491.09