Finding the Third Proportional to 661,587.75 and 989,737.31

Step by Step Solution

1. Step 1: Write the proportion equation
   661,587.75 : 989,737.31 = 989,737.31 : x
2. Step 2: Convert to fraction form
   661,587.75/989,737.31 = 989,737.31/x
3. Step 3: Cross multiply
   661,587.75x = 989,737.31 × 989,737.31
4. Step 4: Simplify right side
   661,587.75x = 979,579,947,754.72
5. Step 5: Solve for x
   x = 979,579,947,754.72/661,587.75
6. Step 6: Final answer
   x = 1,480,650.07