Finding the Third Proportional to 918,607.50 and 1,200,757.50

Step by Step Solution

1. Step 1: Write the proportion equation
   918,607.50 : 1,200,757.50 = 1,200,757.50 : x
2. Step 2: Convert to fraction form
   918,607.50/1,200,757.50 = 1,200,757.50/x
3. Step 3: Cross multiply
   918,607.50x = 1,200,757.50 × 1,200,757.50
4. Step 4: Simplify right side
   918,607.50x = 1,441,818,573,806.25
5. Step 5: Solve for x
   x = 1,441,818,573,806.25/918,607.50
6. Step 6: Final answer
   x = 1,569,569.78