Finding the Third Proportional to 907,989 and 1,272,520.50

Step by Step Solution

1. Step 1: Write the proportion equation
   907,989 : 1,272,520.50 = 1,272,520.50 : x
2. Step 2: Convert to fraction form
   907,989/1,272,520.50 = 1,272,520.50/x
3. Step 3: Cross multiply
   907,989x = 1,272,520.50 × 1,272,520.50
4. Step 4: Simplify right side
   907,989x = 1,619,308,422,920.25
5. Step 5: Solve for x
   x = 1,619,308,422,920.25/907,989
6. Step 6: Final answer
   x = 1,783,400.93