Finding the Third Proportional to 2,123,680 and 4,585,453

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123,680 : 4,585,453 = 4,585,453 : x
2. Step 2: Convert to fraction form
   2,123,680/4,585,453 = 4,585,453/x
3. Step 3: Cross multiply
   2,123,680x = 4,585,453 × 4,585,453
4. Step 4: Simplify right side
   2,123,680x = 21,026,379,215,209
5. Step 5: Solve for x
   x = 21,026,379,215,209/2,123,680
6. Step 6: Final answer
   x = 9,900,916.91