Finding the Third Proportional to 688,188 and 1,619,359.50

Step by Step Solution

1. Step 1: Write the proportion equation
   688,188 : 1,619,359.50 = 1,619,359.50 : x
2. Step 2: Convert to fraction form
   688,188/1,619,359.50 = 1,619,359.50/x
3. Step 3: Cross multiply
   688,188x = 1,619,359.50 × 1,619,359.50
4. Step 4: Simplify right side
   688,188x = 2,622,325,190,240.25
5. Step 5: Solve for x
   x = 2,622,325,190,240.25/688,188
6. Step 6: Final answer
   x = 3,810,477.94