Finding the Third Proportional to 1,358,138 and 2,878,174

Step by Step Solution

1. Step 1: Write the proportion equation
   1,358,138 : 2,878,174 = 2,878,174 : x
2. Step 2: Convert to fraction form
   1,358,138/2,878,174 = 2,878,174/x
3. Step 3: Cross multiply
   1,358,138x = 2,878,174 × 2,878,174
4. Step 4: Simplify right side
   1,358,138x = 8,283,885,574,276
5. Step 5: Solve for x
   x = 8,283,885,574,276/1,358,138
6. Step 6: Final answer
   x = 6,099,443.19