Finding the Third Proportional to 2,128,218 and 4,594,068

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128,218 : 4,594,068 = 4,594,068 : x
2. Step 2: Convert to fraction form
   2,128,218/4,594,068 = 4,594,068/x
3. Step 3: Cross multiply
   2,128,218x = 4,594,068 × 4,594,068
4. Step 4: Simplify right side
   2,128,218x = 21,105,460,788,624
5. Step 5: Solve for x
   x = 21,105,460,788,624/2,128,218
6. Step 6: Final answer
   x = 9,916,963.76