Finding the Third Proportional to 918,153 and 1,290,667.50

Step by Step Solution

1. Step 1: Write the proportion equation
   918,153 : 1,290,667.50 = 1,290,667.50 : x
2. Step 2: Convert to fraction form
   918,153/1,290,667.50 = 1,290,667.50/x
3. Step 3: Cross multiply
   918,153x = 1,290,667.50 × 1,290,667.50
4. Step 4: Simplify right side
   918,153x = 1,665,822,595,556.25
5. Step 5: Solve for x
   x = 1,665,822,595,556.25/918,153
6. Step 6: Final answer
   x = 1,814,319.18