Finding the Third Proportional to 2,118,020 and 4,640,357.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118,020 : 4,640,357.50 = 4,640,357.50 : x
2. Step 2: Convert to fraction form
   2,118,020/4,640,357.50 = 4,640,357.50/x
3. Step 3: Cross multiply
   2,118,020x = 4,640,357.50 × 4,640,357.50
4. Step 4: Simplify right side
   2,118,020x = 21,532,917,727,806.25
5. Step 5: Solve for x
   x = 21,532,917,727,806.25/2,118,020
6. Step 6: Final answer
   x = 10,166,531.82