Finding the Third Proportional to 661,879.50 and 1,445,139

Step by Step Solution

1. Step 1: Write the proportion equation
   661,879.50 : 1,445,139 = 1,445,139 : x
2. Step 2: Convert to fraction form
   661,879.50/1,445,139 = 1,445,139/x
3. Step 3: Cross multiply
   661,879.50x = 1,445,139 × 1,445,139
4. Step 4: Simplify right side
   661,879.50x = 2,088,426,729,321
5. Step 5: Solve for x
   x = 2,088,426,729,321/661,879.50
6. Step 6: Final answer
   x = 3,155,297.50