Finding the Third Proportional to 870,480 and 1,331,640

Step by Step Solution

1. Step 1: Write the proportion equation
   870,480 : 1,331,640 = 1,331,640 : x
2. Step 2: Convert to fraction form
   870,480/1,331,640 = 1,331,640/x
3. Step 3: Cross multiply
   870,480x = 1,331,640 × 1,331,640
4. Step 4: Simplify right side
   870,480x = 1,773,265,089,600
5. Step 5: Solve for x
   x = 1,773,265,089,600/870,480
6. Step 6: Final answer
   x = 2,037,111.81