Finding the Third Proportional to 1,515,490 and 3,316,380

Step by Step Solution

1. Step 1: Write the proportion equation
   1,515,490 : 3,316,380 = 3,316,380 : x
2. Step 2: Convert to fraction form
   1,515,490/3,316,380 = 3,316,380/x
3. Step 3: Cross multiply
   1,515,490x = 3,316,380 × 3,316,380
4. Step 4: Simplify right side
   1,515,490x = 10,998,376,304,400
5. Step 5: Solve for x
   x = 10,998,376,304,400/1,515,490
6. Step 6: Final answer
   x = 7,257,307.08