Finding the Third Proportional to 1,042,128 and 2,167,200

Step by Step Solution

1. Step 1: Write the proportion equation
   1,042,128 : 2,167,200 = 2,167,200 : x
2. Step 2: Convert to fraction form
   1,042,128/2,167,200 = 2,167,200/x
3. Step 3: Cross multiply
   1,042,128x = 2,167,200 × 2,167,200
4. Step 4: Simplify right side
   1,042,128x = 4,696,755,840,000
5. Step 5: Solve for x
   x = 4,696,755,840,000/1,042,128
6. Step 6: Final answer
   x = 4,506,889.60