Finding the Third Proportional to 661,911.75 and 1,428,799.50

Step by Step Solution

1. Step 1: Write the proportion equation
   661,911.75 : 1,428,799.50 = 1,428,799.50 : x
2. Step 2: Convert to fraction form
   661,911.75/1,428,799.50 = 1,428,799.50/x
3. Step 3: Cross multiply
   661,911.75x = 1,428,799.50 × 1,428,799.50
4. Step 4: Simplify right side
   661,911.75x = 2,041,468,011,200.25
5. Step 5: Solve for x
   x = 2,041,468,011,200.25/661,911.75
6. Step 6: Final answer
   x = 3,084,199.69