Finding the Third Proportional to 918,135 and 1,290,649.50

Step by Step Solution

1. Step 1: Write the proportion equation
   918,135 : 1,290,649.50 = 1,290,649.50 : x
2. Step 2: Convert to fraction form
   918,135/1,290,649.50 = 1,290,649.50/x
3. Step 3: Cross multiply
   918,135x = 1,290,649.50 × 1,290,649.50
4. Step 4: Simplify right side
   918,135x = 1,665,776,131,850.25
5. Step 5: Solve for x
   x = 1,665,776,131,850.25/918,135
6. Step 6: Final answer
   x = 1,814,304.14